Fn and Numlock

I've learned about how to hide a folder in some Desktop in Youtube. As a Youtube learner, I know most of you had already knew that. But I'll just show
the method.
1. Click right button of the mouse and a menu would come out, go to New, and Folder.
2. You are now making a new folder.
3. Now press Fn+Numlk button. Press both at the same time.
4. You are now enabling the Numlock key.
5. Look for the key with a blue number (On your keyboard, not on the desktop).
6. Click on the new folder to rename it. Click again if nothing happen.
7. Now you are renaming the folder.
8. Press Alt+2+5+5. Use the blue key (Numlock key) for the number.
9. You'll see that the name tab become smaller. Mean, you had rename the folder.
10. Right-click on the folder. Click on 'Properties' and now you are on the properties side.
11. You'll see a few tab like 'General', 'Sharing', 'Security', 'Previous Version' and 'Customize'. Click on 'Customize'.
12.  Now you're on the 'Customize' tab. Look on the bottom and you'll see a 'Change Icon..' button. Click it.
12. Scroll to the right to search for the 'Invisible Icon'. Usually, there are three of them. You can choose any one.
13. Click on the 'Invisible Icon' and click 'OK' button.
14. Now you have made a private and invisible button.

What happen when you click right button on the mouse.

Got a New Folder

What happens when you press Alt+2+5+5 in Numlock Key

The 'invisible icon'. There's three of them.

This is not my keyboard. I got this image from the internet. Its Numlock key(The one in circle) is red, but mine is blue

My new invisible folder!!

And if you had forgot the position of your 'Invisible folder', just press F5 on the top of your keyboard. You'll see the folder appeared and disappeared repeatedly. It's looks more like blinking.

That is what combination of Numlock key when 2 plus 2 plus 5.
Some of the result when you press Alt plus the Numlock key.

(1-9)       ☺☻♥♦♣♠•◘○
(10-19)    ◙♂♀♪♫☼►◄☺‼
(20-29)    ¶§▬↨↑↓→←∟↔
(30-39)    ▲▼ !"#$%&'       <= Number 32 is space
(40-49)    ()*+,-./01
(50-59)    23456789:;
(60-69)    <=>?@ABCDE
(70-79)    FGHIJKLMNO
(80-89)    PQRSTUVWXY
(90-99)    Z[\]^_`abc
(100-109)dfghijklm
(110-119)nopqrstuvw
(120-129)xyz{|}~⌂Çü
(130-139)éâäàåçêëèï
(140-149)îìÄÅÉæÆôöò
(150-159)ûùÿÖÜ¢£¥₧ƒ
(160-169)áíóúñѪº¿⌐
(170-179)¬½¼¡«»░▒▓│
(180-189)┤╡╢╖╕╣║╗╝╜
(190-199)╛┐└┴┬├─┼╞╟
(200-209)╚╔╩╦╠═╬╧╨╤
(210-219)╥╙╘╒╓╫╪┘┌█
(220-229)▄▌▐▀αßΓπΣσ
(230-239)µτΦΘΩδ∞φε∩
(240-249)≡±≥≤⌠⌡÷≈°∙
(250-256)·√ⁿ²■        <=Number 255 and 266 are space. Number 257 repeating the Number 1, that is ☺