Show a number that indicates workspace number

[fedxyz]

Hi,

it is possible to have a number for every application in the alttab window that indicates the workspace where the application is?
For example for every "tile" a number on the bottom right.
I am using i3.

Thanks for the help.

[sagb]

Implemented with new option: -b 1, which is default when alttab runs in multi-desktop mode.