how define custom shortcut in ubuntu to change keyboard layout [duplicate]

in windows, shortcut to change keyboard layout is Alt+Shift. in previous versions of Ubuntu it was available to select this shortcut for changing layout. but in recent Ubuntu versions it is not available. in Ubuntu 21.10 when i select Customize Shortcuts in settings it does not accept Alt+Shift as a shortcut. is there any conflict between my preferred shortcut and Ubuntu default shortcuts cause this problem? how can i overcome this issue?

Solution 1:

To assign Alt+Shift for switching keyboard layouts, you will need to install Gnome Tweaks. In Tweaks, go to the "Keyboard & Mouse" tab and then click the "Additional Layout Options" button. In the dialog that appears, open the section "Switching to another layout" and select "Alt+Shift" there.

For your information, independent from the above, Super+Space is already configured by default to switch to another keyboard layout in Ubuntu. That shortcut key can be changed in "Settings" - "Keyboard", section "Typing".