Hi GHSP Test Lab! Welcome to the OptoForums.
You're correct. More detail from one of our in-house experts:
...right now there is no way of dynamically adding / removing objects from comboboxes. Like all other controls in PAC Display, what you design in Configurator is what you get in Runtime. There might be some workarounds...
I like this idea:
...make a few bordlerless windows that each contain a different combobox. These windows could have the same coordinates but different visibilities depending on some variable state. Then only the "correct" combobox would appear, etc.
Hope that helps!