I have configured Stellarium 25.1 to use a large external HDMI
monitor according too:
<
https://support.apple.com/guide/mac-help/work-in-multiple-spaces-mh14112/mac>
Assign apps to spaces
When I launch Stellarium-25.1-qt6-macOS, the startup panel shows normally,
then the sky view appears normally centered in the external monitor
for one second, then vanishes and reappears far to the right, mostly hidden.
I can drag it back to center.
The misbehavior does not occur with 24.4.
Does this affect planetarium projectors?
The good news is that when I drag a sky view between monitors the
change in screen resolution is handled properly, which 24.4 did wrong.
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Thanks,
gil