Ubuntu – How to interpret a keyboard layout

keyboardkeyboard-layout

I have activated the keyboard for Indian scripts as shown here.
Upon checking the keyboard layout, I find 4 symbols mapped to one key:

I am able to input the characters

I want to access the symbols on the right side of the mapping. How can that be done?

You can input the symbols

Here is my "commandline solution" (Ubuntu 12.04 server on MacBookPro 10.9 within VirtualBox 4.3.8) :

sudo apt-get install keyboard-configuration
sudo dpkg-reconfigure keyboard-configuration

Keyboard-configuration choices for MackBookPro French keyboard:

-> MacBook / MacBookPro (Intl)

-> French

-> French (again)

-> Right Alt (AltGr)

-> No Compose Key

It seems keyboard settings works fine and are keep after reboot.

--- EDIT Thomas ---

You should install all the console tools to make it work

apt-get install console-data

apt-get install console-setup

apt-get install console-locales

apt-get install keyboard-configuration

One way to come close to the desired behavior is to

I tested it with a ~/.XCompose file with only this line:

<Multi_key> <Cyrillic_es> <Cyrillic_ha> : "ш" Cyrillic_sha # CYRILLIC SMALL LETTER SHA

When using the Russian (phonetic) keyboard layout it lets me do:

Compose followed by С followed by Х -> ш