This works on current Proline TriCasters using an M/E with or without Advanced Edition. You can do something similar on older TriCasters (450/455 etc.) using a DSK but it's not as flexible and you don't have macros.
- In an M/E (in Mix mode) load one of the DVEs from the 'Expand' folder.
- Select your two sources on the 'A' and 'B' buses in the M/E.
- Assign the T-Bar to the M/E using the 'ME' button in the lower right hand corner of the controller. On the Mini use the 'Switcher Delegate' on the CS for this.
- Put the DVE in reverse mode by pushing the 'Select' knob down on the controller.
- Pull the T-Bar smoothly half way down.
- See the 'A' source squeeze as per the selected DVE revealing the 'B' source.
- Record this as a macro for ease of use.