How to enable those function (alt + number) on my elementary OS? I can't insert tilde and "ñ" letter because I don't have those buttons and also can't use the alt + number. Someone have an idea? Thanks
Often this is easier with the compose key. With the compose key configured you use key combos to produce special characters. For example:
- For ë: Compose + " + e
- For ẽ: Compose + ~ + e
- For ô: Compose + ^ + o
- For á: Compose + ' + a
Note that you do not have to hold down the compose key; just press each key in order.
To set the compose key
- Open "System Settings"
- Select "Keyboard"
- Select "Options".
- In the left pane, select "Compose Key Position"
- In the right pane, choose a key to act as Compose
Original answer from AskUbuntu
The feature that you mention is typical of Windows systems to write ASCII characters. The *nix OS's, like elementaryOS, don't use ASCII code. But you can use UNICODE, which it's more extensive than ASCII.
To type an unicode character you must use
Ctrl+Shift followed by the code you can find at:
To write them:
- Make sure you don't have
Shiftkeys meanwhile type
U. Now you can see an underline U.
- Release the keys
Shift, and type the Unicode number.
- Finally, hit
For example, to write the "Ñ" character, you must use the combination:
ctrl + shift + u + 00D1 + enter
When you use this trick in Scratch, you can't see the underline U, but it works also.