Press Ctrl + F1 to toggle the Ribbon visibility.
Follow this guide to restore your interface and get back to work. Quick Fix: Check the Ribbon Display kofax power pdf toolbar missing
Sometimes the toolbar isn't missing—it’s just hidden to save screen space. Press Ctrl + F1 to toggle the Ribbon visibility
Regardless of the cause, the fix usually lies within one of the following three categories: Ribbon Settings, Add-in Management, or Re-installation. or Re-installation. If the above fail
If the above fail, the installation may be partially corrupted.