How change language layout from keyboard like alt+shift i can only do the following
$ setxkbmap us
$ setxkbmap sy
change language layout manually
If you're on the command line use
Specifically for CLI: Go to "Localization options" and "Change Locale".
If you are on the desktop raspi-config is also available as an application. This is the default Raspberry Pi way to change the keyboard lay-out.
If you are not from the UK you might want to do some of the following:
Keyboard - look for the uk and change it to your type (us will do us, aus, can, nz etc). Then save and exit.
sudo nano /etc/default/keyboard
Locale - uncheck the uk and check the one you need and then set it as default. Mine is en_AU UTF-8
sudo dpkg-reconfigure locales
sudo dpkg-reconfigure tzdata
Reboot to get the full effect.