You have multiple screens that have different scaling factors in Windows
For example, on my system I have three (3) screens:
Screens 2 & 3 are standard HD (1920 x 1080 resolution) and are scaled at 100%. Screen 1, is UHD (4K - 3840 x 2160 resolution) and is scaled to 200%
If I drag a tab from AutoCAD (that normally is on screen 1), and drag it to screen 2 or 3, it maintains it's 200% scaling and doesn't adapt to the current screen scaling, and will not fit correctly on either screen.
This is currently by design, as the scaling from the dragged window is using the current scaling of the screen AutoCAD is running on
When you drag a tab off to a differently scaled screen, simply resize it to fit
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