I use ZoomText 10.1 at work and soon will be upgrading. ZoomText 11 is a legacy product. The latest version is 2019.
In the Desktop Layout Mode, the main modifier key is Caps Lock. And in the Laptop Layout Mode, the modifier keys are Caps Lock + Alt.
For your interest, here are some ZoomText Hotkey Commands that every user should know
Zoom In / Out Caps Lock + Up / Down
Zoom to 1x (toggle) Caps Lock + Enter
Enhance Colors On/Off Caps Lock + C
Show User Interface Caps Lock + Ctrl + U
ZoomText On/Off Caps Lock + Ctrl + Enter
Launch AppReader Caps Lock + Alt + A
Voice Faster / Slower Caps Lock + Alt + Up / Down
Voice On/Off Caps Lock + Alt + Enter
If you have Windows 10, I don’ think you need ZoomText. Most of its functions can be achieved with the accessibility features native to Windows 10 and NVDA.