I tested ctrl+shift+z, searched in Setting Shortcut Mapper... and Typed ALT+026 .
Also checked all shortcut possible on keyboard, but wasn't successful to find "SUB"
character.
Please help me. thanks!
I found the way after a while :)) it is an special command written "sub" with a black background I cached it by removing the short cut saved it the setting of notepad++ and then push ctrl+Z