Window placement issue

[videosmith]

When launching the app, either from command line or associated shortcut and HDMI1 has focus, app loads in HDMI 2. Can I force it to open in a specific monitor?

Raspberry PI 4B, Raspbian 10 Buster, latest updates as of 9/17/2021).
Both HDMI channels converted to SDI feeds into BlackMagic's SmartScope Duo monitors (see pic).

*edit-replaced incorrect pic

[Cuperino]

I don't think we've ever defined any kind of behavior with regards to initial window size and placement. I think the window manager may be fully responsible for the placement that you see. Loading Imaginary Teleprompter on KDE Plasma, which uses the kwin window manager, always opens the editor window on the display that had a window presently active. That is, if I start the program from the first display, the window opens on the first display, and if I start it from the second, it loads on the second.

Nevertheless, programs can ask to override window manager behavior. We could add a form of memory, so that window placement and size are remembered, like in my other software. There is no cross-platform way for Imaginary Teleprompter to know from which display the app was launched.