Pro 3 : Toggle Protocol
The Pro 3 keyboard supports both Gemini and TX Bolt protocols but is in Gemini by default.
How to toggle
Plug in the keyboard.
Press and hold S (both left S keys) + D + Z together for ~5 seconds. (Red keys in image above).
Watch the LED next to the USB port:
Rapid flashing = TX Bolt is selected
Slow flashing = Gemini PR is selected
Release. The keyboard remembers the mode even after it’s unplugged.
Repeat the same key chord any time to switch back.
Compatibility
Gemini PR: digitalCAT, Eclipse, Plover
TX Bolt: Case CATalyst (choose Baron Realtime), Plover
Tips
Close other steno apps before connecting; only one program can use the COM port at a time.
If the LED doesn’t start flashing, keep holding the chord until it does, then release.
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