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Showing posts with label galaxy. Show all posts
Showing posts with label galaxy. Show all posts

Tuesday 29 September 2015

How to use Galaxy Note 5 screen off memo?

How to use Galaxy Note 5 screen off memo?


Galaxy Note 5 screen off memo lets you create action memos without turning on the screen. This guide shows you how to use Galaxy Note 5 screen off memo and how to open them as action memos in S Note app.


Samsung Galaxy Note 5 has several new features.  One of the most useful S Pen feature is Galaxy Note 5 screen off memo, which allows you to write on a locked screen like on a blackboard using your S Penwithout unlocking the phone.
This guide tries to explain to you what is Galaxy Note 5 screen off memo, and how to use Galaxy Note 5 screen off memo.

What is Galaxy Note 5 screen off memo?

Galaxy Note 5 screen off memo is a special S Pen feature  introduced in Galaxy Note 5. You can quickly create memos by writing on the screen with S Pen without turning on it.
In other words, when the screen is still locked and black, you can use S Pen to write on the screen like on a blackboard.
You can edit or erase what you wrote.  Then save what you wrote as an action memo.
The tricky features of Galaxy Note 5 screen off memo include:
  • the screen is still locked.
  • Galaxy Note 5 screen turns into a blackboard and your S Pen is the chalk.
  • you cannot use your finger.
  • you have a eraser to remove part or all of what you have written.
  • you can choose to delete without saving.
  • you can choose to save what you have written as an action memo.
You probably should not worry about too much battery usage, because the super AMOLED screen on Galaxy Note 5 does not consume battery for black color (the black pixels is not lit up).

How to use Galaxy Note 5 screen off memo?

To use Galaxy Note 5 screen off memo, you can follow these steps.

Step 1: Enable Galaxy Note 5 screen off memo

By default, Galaxy Note 5 screen off memo is turned off.
To use Galaxy Note 5 screen off memo, you need enable it.  InSettingsS Pen, you can enable screen off memo as shown below.
Once Galaxy Note 5 screen off memo is enabled, the switch will be shown as green as shown below (if you are using the default Galaxy Note 5 theme).
Please note, you need enable Galaxy Note 5 screen off memo only once.  The feature will be available until you manually disable it.
How_to_use_Galaxy_Note_5_screen_off_memo_1_settings How_to_use_Galaxy_Note_5_screen_off_memo_2_turn_on_screen_off_memo

Step 2: Make sure Galaxy Note 5 screen is locked and turned off

Galaxy Note 5 screen off memo only works when the screen is off (black).
By default, you can press the power button to turn off the screen and lock the screen.

Step 3: Pull out S Pen

When the screen is off, you can detach S Pen from Galaxy Note 5.Please do NOT touch home button or power button to turn on screen.
To detach Galaxy S5 S Pen, you need press the end of the S Pen to disengage it. Then pull the S Pen out of the S Pen slot as shown below..
You may check this guide to detach and store S Pen on Galaxy Note 5.
How_to_use_Galaxy_Note_5_screen_off_memo_3_pull_out_S_pen

Step 4: Write what you want on the screen

Once S Pen is detached from Galaxy Note 5, and if the screen is off,  you screen will now become a blackboard as shown below.
How_to_use_Galaxy_Note_5_screen_off_memo_4_screen_off_memo_interface
There are 4 buttons on the top:
  1. S Pen mode.  You can use S Pen to write on the screen, just like a white chalk on a blackboard.
  2. Eraser mode. In this mode, you are make corrections. You can erase any strokes. Please note, the eraser erases one stroke at one time. It is NOT based on pixels.
  3. Discard the memo. You can tap this button to discard the memo and turn on the screen.
  4. Save the memo. Tap this button to save the memo and turn on the screen.
By default, you are in S Pen mode. You can write straightaway after pulling out the S Pen as shown below.
After finishing your memo, tap SAVE button to save it as an action memo in S Note as shown below.
How_to_use_Galaxy_Note_5_screen_off_memo_5_save_memo How_to_use_Galaxy_Note_5_screen_off_memo_6_open_memo_s_note

Step 5 (optional): Edit Galaxy Note 5 screen off memo in S Note.

Once you save the Galaxy Note 5 screen off memo, the memo will be saved as an action memo in S Note (see above).
You can edit it further in S Note app later.
When the memo is saved, you will also get a notification message in the notification panel as shown below.
How_to_use_Galaxy_Note_5_screen_off_memo_7_saved_memo

How to access Galaxy Note 5 screen off memo in S Note app?

All memos created and saved in Galaxy Note 5 screen off memo are saved as action memos in Galaxy Note 5.
You need start S Note app to access action memos.
Once S Note starts, the default view is “All” as shown below.
You can tap ALL button as shown below to switch to action memos as shown below.
How_to_use_Galaxy_Note_5_screen_off_memo_8_s_note How_to_use_Galaxy_Note_5_screen_off_memo_9_action_memos
You can edit and link an action to the memo by tapping MORE button after opening the memo.
The detailed usage of action memos will be covered in this guide (coming soon!!).
How_to_use_Galaxy_Note_5_screen_off_memo_10_action_memos

Can you use Galaxy Note 5 screen off memo now?

If you have any questions on Galaxy Note 5 screen off memo, or encounter any problems when using Galaxy Note 5 screen off memo, please let us know in the comment box below.
The community will try to help you.
For other Galaxy Note 5 features and detailed Galaxy Note 5 how-to guides , please check Galaxy Note 5 how-to guides page.
You may also download and read the official Samsung Galaxy Note 5 user manual here.

How to take a screenshot on Galaxy Note 4?

How to take a screenshot on Galaxy Note 4?

When you want to show  someone remotely the Galaxy Note 4 screen, e.g., the achievement in a game, booking proofs, ordering info, some key information on a website, location in the Google Map, a Galaxy Note 4 screenshot is the most simple way to deliver such info.
But how to take a screenshot on Galaxy Note 4?
Luckily, there are many different methods to take screenshot on Galaxy Note 4.
In this guide, I will show you 3 different methods of taking a screenshot on Galaxy Note 4 without using any apps, or connecting to other devices. In other words, you can take a  screenshot on Galaxy Note 4 directly. No apps, or connections are involved.

Method 1: Take a screenshot on Galaxy Note 4 with Home and Power button

In the early days,  most Androidphones had a hardware home button. The Home button and power button combination is usually for screenshot.
Samsung is a few Android manufactures who refuse to bury hardware home button. So, you can have a simple way to take  a screenshot on Galaxy Note 4.
On any screen, press and hold power button and Home button simultaneously to take a screenshot on Galaxy Note 4.
In the reality, it is hard to press and hold two buttons simultaneously. So this may cause one of the two problems:
  1. Galaxy Note 4 exits current app and return to home screen. This means you press Home button too early.
  2. Galaxy Note 4 shows power options (restart the phone, shutdown the phone..). This means you press Power button too early.
The secret of successfully taking a  screenshot on Galaxy Note 4 is to press and hold the power button “slightly” earlier.
There is a reason for this secret. Home button will response normally within 100ms (about 0.1s) once pressed. But power button only responses usually after 500ms (0.5s).
Using Home button  and Power button to take a screenshot works not only on Galaxy Note 4, but also on almost all Galaxy devices from Samsung.

Method 2:  Take a screenshot on Galaxy Note 4 by swiping your palm over the screen

The second method of taking a screenshot on Galaxy Note 4 may require patience. But it is fun.
You can simply swipe your palm over the Galaxy Note 4 screen as shown below to take a screenshot on Galaxy Note 4.
take-a-screenshot-on-galaxy-note_4-swiping-palm
By default, this feature is turned on. But you may accidentally turned it off if you find this method is not working.
You can enable this feature by following these steps:
Step 1: Go to settings –Motions and gestures.
Step 2: Tap Palm swipe to capture if it is off.
Step 3: Turn it on by drag the switch to right until the color is green.
take-a-screenshot-on-galaxy-note_4_settings-motions-gesturestake-a-screenshot-on-galaxy-note_4_crop_enable-palm-swipe-settings

Again, this palm swiping method of  taking a screenshot on Galaxy Note 4 also works on most other Samsung Galaxy devices.

Method 3:  Take a screenshot on Galaxy Note 4 with S your S Pen using Screen Write (air command)

In old Galaxy Note devcies (Galaxy Note, Galaxy Note 2, Galaxy Note 3, Galaxy Note 8.0, Galaxy Note 10.1, Galaxy Note 10.1 2014 edition and Galaxy Note Pro), you can take a screenshot by  holding the S Pen button, then tapping and holding the S Pen on the screen.
But this S Pen method does NOT work for Galaxy Note 4, due to the new smart select feature in Galaxy Note 4.
Then, can I take a screenshot on Galaxy Note 4 with the S Pen?
Yes, you still can use S Pen to take a screenshot on Galaxy Note 4.  But now you need use one of the four air commands in Galaxy Note 4screen write.
Air command will be launched  when the S Pen  is removed from the slot, or when the S Pen is hovering over any part of the screen with S Pen button pressed.
In the four options of air command, tap screen write to take a screenshot on Galaxy Note 4.
Once the screenshot is taken, you will be offered the options to edit, share, and save the screenshot, as shown below. Tap the check symbol to save the screenshot.
Please note, when screen write is used to take a screenshot on Galaxy Note 4, the editing option is always provided and the screenshot is NOT saved until you tap the check symbol.  This behavior is different from the previous 2 methods.
take-a-screenshot-on-galaxy-note_4_using-screen-write-air-commandtake-a-screenshot-on-galaxy-note_4_using-screen-write-air-command-edit
Screen write was introduced in Galaxy Note 3. So this method also works on Galaxy Note 3, Galaxy Note 10.1 2014 edition and Galaxy Note Pro.

Are there any other methods to take a screenshot on Galaxy Note 4?

Yes, there are some other methods to take a screenshot for Galaxy Note 4.
One of the most common method for all Android devices is throughAndroid debug monitor.  But this required enable some developers options and USB connection with the PC.

Do you have any problems to take a screenshot on your Galaxy Note 4?

Please let us know your problems in the comment box below. We will try to help you.
For other Galaxy Note 4 problems, please check our Galaxy Note 4 how-to guides page.


How to use scroll capture in Galaxy Note 5?

How to use scroll capture in Galaxy Note 5?


Scroll capture in Galaxy Note 5 lets you take one screenshot that includes multiple screens. In one screenshot, you can cover a whole webpage or other contents that cannot be fitted into one Galaxy Note 5 screen. This Galaxy Note 5 guide shows you how to use Galaxy Note 5 screen capture.

In addition to taking screenshot in 3 different methods, Galaxy Note 5 introduced a new air command feature for taking screenshot: scroll capture.
Currently, scroll capture is an exclusive feature in Galaxy Note 5. No other phones have this feature in the market!
This guide will explain to you what is  scroll capture in Galaxy Note 5, how to use scroll capture and how to manage screen scroll screenshots.

What is scroll capture in Galaxy Note 5?

In Galaxy Note 5 (Galaxy Note 3 and Galaxy Note 4 as well), you can use screen write to take screenshot as explained in this guide.
But if you want to take screenshot for contents that cannot be fitted into one screen, e.g., a web page,  you have to take several screenshots to cover the contents when manually scrolling down.
If you want them to be in one screenshot, you may use some photo editing apps to glue them together.
This can be a painful job.
Now, Galaxy Note 5 scroll capture can guide you to take screenshot when scrolling pages automatically for you, and give you one screenshot that covers all screens you scrolled.
This scroll capture works on all contents, not just web pages, on Galaxy Note 5.
Galaxy Note 5 scroll capture is part of the screen write, a feature ofGalaxy Note 5 air command.

How to use scroll capture in Galaxy Note 5?

To use scroll capture in Galaxy Note 5, you may follow these steps.

Step 1: Open the content for which you want to take screenshot

For example, you want to take a screenshot for webpage of How to use Galaxy Note 5 screen off memo in Chrome browser.
In your Chrome browser, open the page as shown below.

Step 2: Launch Galaxy  Note 5 air command

You can launch air command in Galaxy Note 5 with one for the three methods:
  • Use S Pen detection;
  • Use S Pen button;
  • Use air command floating icon.
Please check this guide if you are not sure how to launch air command in Galaxy Note 5.
galaxy_note_5_scroll_capture_1_step_1_open_contents galaxy_note_5_scroll_capture_2_air_command_screen_write

Step 3:  Tap Screen Write

Once air command is launched, tap screen write with your S Pen as shown above.
This will take a screenshot for current screen immediately as shown below.
If you just take screenshot for one screen, you can save it or edit then save it as explained in this guide.

Step 4: Tap scroll capture.

To take screenshots for more screens, you can tap Scroll capture in bottom left as shown below.
After taping scroll capture, the screen will scroll down one screen automatically and screenshot is previewed near top right (shown in green box below)
In other words, it is not necessary for you to scroll the screen manually. Galaxy Note 5 will take care of it.
If you want to take more screens, tap Capture more as shown below.
Every time you tap capture more, the screen automatically scrolls down one screen.
You can always preview the final screenshot in the sight side (as shown in green box).
galaxy_note_5_scroll_capture_3_scroll_capture galaxy_note_5_scroll_capture_4_capture_more
galaxy_note_5_scroll_capture_5_done galaxy_note_5_scroll_capture_6_edit_save

Step 5: Tap Done.

Once you get all screens in the screenshot, tap Done as shown above.
This will stop the screen capture.

Step 6: Edit and/or save screenshot.

Now, you can edit the screenshot as shown above.
Of course, you can edit the screenshot in Gallery app or any image editing apps.
You can save the screenshot into Gallery, or your scrapbook as shown above.
You can also share the screenshot directly with other devices or apps.

How to manage screenshots taken with scroll capture in Galaxy Note 5?

Screenshots taken with scroll capture are saved in the the folder of DCIM/screenshots.
You can manage these screenshots just like other photos or images.
For example, as shown below, you can edit it with Gallery app.
galaxy_note_5_scroll_capture_7_edit_in_gallery

Can you use scroll capture in Galaxy Note 5 now?

If you have any questions or encounter any problems to use scroll capture in Galaxy Note 5? please leave a comment in the comment box below.
The community will try to help you.
For other Galaxy Note 5 features and detailed Galaxy Note 5 how-to guides , please check Galaxy Note 5 how-to guides page.
You may also download and read the official Samsung Galaxy Note 5 user manual here.


How to enable and access Galaxy Note 4 air command?

How to enable and access Galaxy Note 4 air command?


What is Galaxy Note 4 air command?

Air command is a unique S Pen feature in Galaxy Note devices since Galaxy Note 3.  You can access some features very quickly by hovering the S Pen over the screen. It can dramatically increase your productivity  for some tasks.
In Galaxy Note 3, as discussed in this air command explained post, there are 5 commands: Action Memo, Scrapbook, Screen Write, S Finder, Pen Window.
In Galaxy Note 4, Samsung re-organize the actions into 4:
  1. Action memo: Write memos quickly and link actions to them. You can make calls, send messages, search the web, and more. This is almost identical to that in Galaxy Note 3
  2. New! Smart select: Collect content from the screen quickly. You can collect content from webpages or music and videos during playback.
  3. New! Image clip: Draw around an area of the screen you want to save or share. You can also crop part of an image.
  4. Screen write: Capture, edit, and write memos on screenshots, and then share them. This is actually one of the preferred method to take screenshot on Galaxy Note 4 as discussed in this guide.
galaxy_note_4_air_command

For the usage of these 4 actions in Galaxy Note 4 air command, we will create individual guide.

How to access Galaxy Note 4 air command?

By default, when you remove the S pen from the S Pen slot, Galaxy Note 4 air command will be shown on the screen.
This is due to the default settings in Settings– S Pen –Detachment options as shown below.
galaxy_note_4_air_command_settings_s_pengalaxy_note_4_air_command_settings_s_pen_detachment_options

As you may notice, actually, you can set the S Pen detachment options to action memo or none, instead of the air command.
Some owners are not aware that you can access Galaxy Note 4 air command at any time. I noticed some Galaxy Note 3 owners keep removing S Pen just to access air command.
Another way to access Galaxy Note 4 air command is  hovering  the S Pen over any part of the screen and press the S Pen button. So, you can access the air command whenever you want without putting back the S pen.
Please note,  you need release the S Pen button after pressing it, i.e., NOT holding the S Pen button.

How to enable/disable Galaxy Note 4 air command?

Sometimes, Galaxy Note 4 air command does not pop out when you take out the S pen or hover the S pen over the screen with S Pen button pressed.  You may accidentally disable the air command in your Galaxy Note 4.
To enable or disable Galaxy Note 4 air command, you can go toSettings–S Pen –Air command as shown below.
You may drag the switch to left to disable Galaxy Note 4 air command, right to enable it.
galaxy_note_4_air_command_settings_s_pen_air_command galaxy_note_4_air_command_settings_s_pen_air_command_enabled

Can you access and use Galaxy Note 4 air command now?

If you have any problems or questions using or accessing Galaxy Note 4 air command,   please post them in the comment box below.
We will try to help you find a solution.
If you have any tricks of using or accessing Galaxy Note 4 air command, please also share with the community in the comments.
More how-to guides , tips and tricks for using Samsung Galaxy Note 4 are available at Galaxy Note 4 how-to guides page.


Charge Galaxy Note 5 battery

Charge Galaxy Note 5 battery


how to charge Galaxy Note 5 battery properly? How to use wireless charging and fast wireless charging to charge Galaxy Note 5? How to use fast charging on Galaxy Note 5?.....

Although Galaxy Note 5 battery has a smaller capacity than that of Galaxy Note 4 (3000mAh vs 3220mAh), and the battery is non-removable as discussed in top 5 Galaxy Note 5 defects,  Samsung did introduce some exciting new technologies in Samsung Galaxy Note 5 battery:  fast charging, wireless charging and fast wireless charging.
In this guide, I will share with you on how to charge Galaxy Note 5 battery properly, how to use Galaxy Note 5 fast charging, how to use Galaxy Note 5 wireless charging, and how to use Galaxy Note 5 fast wireless charging. Some frequently asked questions on Galaxy Note 5 battery are also answered.
Because Galaxy Note 5 battery is sealed behind the glass back cover, you cannot use a spare battery.  You also have to visit Samsung service center to replace the battery if needed.
Most battery has a life span of 2-5 years depending on usage and cell quality. Heavy users may have to replace the battery after 12-18 months.
Properly charging Galaxy Note 5 battery can make your battery last longer.
Of course, it is unwise to sacrifice your usage to “protect” you battery: your Galaxy Note 5 costs about $700 and the battery only costs about $50.  The value of your Galaxy Note 5 is redeemed through your usage, not through keeping it fresh.

How to charge Galaxy Note 5 battery

Samsung Galaxy Note 5 can be charged through the USB port (multipurpose jack)  in the bottom with normal USB cable, or charged wirelessly (read on).
In your Galaxy Note 5 box, you can find the charger and an USB cable. You should try to use these official charger and cable.
Do not use low-quality chargers. Such chargers may cause fire and may damage your Galaxy Note 5.  If you want to get a spare charger, try to get it from reliable suppliers.
USB cable may also affect charging. If you want to get a spare USB cable, try to get it from a computer hardware store, not from handphone shops.
To charge Galaxy Note 5 through USB cable, you may follow these steps.

Step 1:  Connect USB cable to the charger

There is no way to get it wrong!  Only the “big” end of the USB cable can be inserted into the charger.
Please make sure it is inserted tightly.

Step 2: Connect USB cable to Galaxy Note 5.

Now, insert the “small” end of the USB cable to the micro USB port in the bottom of Galaxy Note 5 as shown below.
Please note the orientation of the cable. The narrow side of the connector should be on top. For Samsung USB cables, the USB icon should be facing upwards as shown below.
If you put it in the wrong orientation and push it violently, you may damage the USB connector on the phone and the cable.
charge_galaxy_note_5_battery_1_usb_connection

Step 3: Plug charger into an electric socket.

You can plug the charger into an electric socket or extension.  If there is a switch for the socket, turn the power on.

Step 4: Wait till Galaxy Note 5 is fully charged.

The indicator LED in the top left of Galaxy Note 5 (see Galaxy Note 5 layout) should turn red.
Now it is time to relax.
With the official Samsung charger, it should take about 90 mins (from 0%) to charge the battery to full.
You can check the status by waking up the screen. In the lock screen it should shows you the battery charging status.
Once Galaxy Note 5 battery is fully charged, the indicator LED should turn green. So, it is not necessary to wake up the screen to check the charging status.

Step 5: Disconnect USB cable from Galaxy Note 5

Once Galaxy Note 5 battery is fully charged, you can and should disconnect USB cable from Galaxy Note 5.

Step 6: Unplug the charger from socket

It is recommended to unplug the charger from the socket or turn off power for the socket.

Is fast charging harmful to Galaxy Note 5 battery?

The official Samsung charger for Galaxy Note 5 in your box is actually a fast charger (adaptive charger). This is why you can charge Galaxy Note 5 in about 1.5 hours.
Fast charging is supported and enabled in Galaxy Note 5. You cannot disable it. This is different from Galaxy Note 4, in which you can disable fast charging if you are not comfortable with it.
Fast charging is achieved through elevated voltage (from 5V to 9V), not through increased current. The adaptive charger has a special chip to communicate with the battery (and the phone) to determine the proper output power depending on battery level and other parameters. Once the battery level reaches above about 50-60%, the charger will function as a normal wall charger and fast charging is essentially disabled.
Theoretically, fast charging may increase wear and tear to the battery cells due to higher charging power.
But technically, the impact is very marginal. You should not worry too much about it.
It may slightly shorten life span of Galaxy Note 5 battery. But the gains of shorter charging time usually offer more value for the phone.

How to use wireless charging to charge Galaxy Note 5 battery?

Like Galaxy Note 4, Galaxy Note 5 also has a built-in wireless charging coil. This means you can charge Galaxy Note 5 battery through wireless charging.
To use wireless charging to charge Galaxy Note 5 battery, you need awireless charging pad.  Unfortunately, Samsung did not bundle it in the box.
Galaxy Note 5 wireless charging supports both Qi and PMA charging standards. So, it is easy to get a wireless charging pad for Galaxy Note 5. It should cost you less than $40.
Please note, if you want to use “fast” wireless charging for Galaxy Note 5 (see next section), you have to use Samsung’s fast wireless charging pad. There are no offers from other vendors.
It is very simple to use wireless charging to charge Galaxy Note 5 battery.  You just put Galaxy Note 5 in the center of the wireless charging pad.  The charging pad should illuminate certain color (for Samsung wireless charging pad, it is blue)  to indicate the charging is progress.
Once Galaxy Note 5 battery is fully charged, the charging pad will also change color. For Samsung wireless charging pad, the color is green.
Of course, you can check the charging status by waking up the Galaxy Note 5 screen.
charge_galaxy_note_5_battery_wireless_charging

How to use fast wireless charging to charge Galaxy Note 5 battery

In addition to normal wireless charging, Galaxy Note 5 also introduced fast wireless charging, which is 50% faster than normal wireless charging.
Unfortunately, only Samsung currently offers the fast wireless charging pad. It will cost you about$70 in Amazon.
Please note, Samsung sells both normal wireless charging pad and fast wireless charging pad. For fast wireless charging pad, it is clearly marked with “fast charge” as shown below.
Fast wireless charging pad will function as normal wireless charging pad if the device does not support fast wireless charging. Currently, only Galaxy Note 5 and Galaxy S6 edge+ support this.
charge_galaxy_note_5_battery_fast_wireless_charging

Must I charge Galaxy Note 5 battery before using it for the first time?

Samsung recommends you to charge Galaxy Note 5 battery before using it for the first time.
This is not a requirement, just a recommendation.
In reality, as Samsung does not offer 1-for-1 replacement in many regions, you have to test Galaxy Note 5 before making payment.
The new Galaxy Note 5 battery should have about 50% capacity when leaving factory. It is enough for you to try and test the phone.
If you want, you can use Galaxy note 5 till it reminds you to connect to the charger.
Of course, if you want to play safe. You can charge Galaxy Note 5 battery to full before using it.
But is is NOT necessary to leave it on the charger for 8 hours.

FAQs on charging Galaxy Note 5 battery

What’s the typical charging time for Galaxy Note 5?

The typical charging time when you charge Galaxy Note 5 battery (from 5% to fully charged) varies:

Is leaving Galaxy Note 5 on the charger overnight harmful for the battery?

No, there are no evidences to show it is harmful to Galaxy Note 5 battery.
But it is a BAD habit.

Then, is leaving Galaxy Note 5 on the charger overnight good for the battery?

No, there are no evidences to show it is good for Galaxy Note 5 battery,.
But it is a BAD habit.

How to disable Galaxy Note 5 fast charging?

Unlike in Galaxy Note 4, you cannot disable fast charging in Galaxy Note 5.
If you really want to disable Galaxy Note 5 fast charging, you can use non-adaptive chargers, i.e., normal wall chargers.

Why fast charging is not working on Galaxy Note 5?

You need use an adaptive charger (like the one in your Galaxy Note 5 box).

Why fast charging is not fast when charging my Galaxy Note 5 battery?

Fast charging will be essentially disabled if:
  • the screen is on, or
  • after battery level reaches about 50-60%.
Also, it is important to insert both ends of the cable tightly into the charger and Galaxy Note 5.

I was told, to use fast charging, I must plug the charger to the wall socket, not an extension. Is this true?

It is totally wrong.
As long as power is supplies to the charger, the charger has no idea it is from a socket or an extension.
Of course, stable voltage is important to keep the charger cool and efficient.

Why is Galaxy Note 5 battery still charging when it is 100%?

It is normal.
100% means reaching 100% based on estimation. It can take a few more mins, even longer,  to reach “fully charged”.
Fully charged is a hardware state of the battery, not an estimation.
For other Galaxy Note 5 features and detailed Galaxy Note 5 how-to guides , please check Galaxy Note 5 how-to guides page.