If you use multiple monitors, it is possible that texts and symbols in BIMcollab Zoom are displayed as very small or too big.
A workaround is to switch off the scaling; everything is then put on 100%.
Right-click on BIMcollab Zoom icon (on your desktop)
Click on Properties
Go to the tab Compatibility (1)
Hit the 'Change High DPI settings' button (2)
Check on the box in front of 'Override high DPI scaling behavior' (3)
Select by Scale performed by 'system' (4)
Press OK