Can't Zoom by shortcut

In Omniplan task view I can’t use the keyboard shortcuts to zoom in. If I select them from the menu they work though.
Admittedly I am ++newb on this software and thrashing about to learn how it can help me, but I come from video and film editing where timelines are everything and quickly zooming in/out would be considered make or break for any software.

the keyboard shortcut works, it is command > (make sure to use the SHIFT key as the arrow is secondary)