What to do If Your Keyboard's AltGR Key is Broken

AltGr Key

A little water has been spilled on my laptop's keyboard. And just one key has been broken now. AltGr key... My keyboard is Turkish Q setup. AltGr key is important for following characters:

₺ # $ € @ { } [ ] \ | ~ 

If you use Windows, you can use CTRL+ALT key combination. It behaves same as AltGr key. Or you can use alt codes. For instance while pressing ALT key, press 64 on numpad. With this combination, you can write @ character on the screen. These two solutions are very efficient for Windows operating system. 

On Ubuntu, you can't use alt codes while pressing ALT key. Because ALT key has some other shortcut duties for productivity. You can't use CTRL+ALT combination too. 

So, thinked about today. How can i write those special characters. Of course researched about it. And found a solution. 

There ise an application in Ubuntu Software store. "GnomeTweaks"

1. First install it. Then run it. 
2. Go to keyboard and mouse section.
3. Go to additional options.
4. Find "Level 3" section. 
5. And assign a key whatever you want. 

 Now you can use the key you assigned same as AltGR key.