My timeline has zoomed out URGENT PLEASE HELP

Hey guys
I have a project due tomorrow, which i am editing on DaVinci Resolve. During the editing I used the command 'shift Z' to zoom out so I could get reach the marker faster. Normally, it would zoom in again by clicking on 'shift Z' again, but now it doesn't react... I really hope you guys can help

Ida, could you possibly have a hidden window open?

you'll get the answer from the manual far faster than from forums for most things

Please use Worksplace> Reset UI Layout<.
In addition, use Command +/- to zoom In/Out.