Hello I am new to 3DS max so I am sorry if this has been posted and I didn't see it. I can't reproduce the issue all the time, it just seems to come and go and I haven't figured out why.
I'm trying to run 3DS Max 2021 across two "monitors", and sometimes there is this problem: the drop-down menus (File, Edit etc.) and sometimes other UI bits are blurry and oversized, I think some menus show up completely off-screen where I can't see them. Not always all of the menus, sometimes only certain drop-downs like File and Customize, other times all of them, and then sometimes just one only. Floating viewports can also behave oddly - even if they are on the main laptop display - like randomly pulling the view out to max zoom distance when I have definitely not touched any keys or mouse, or not responding to inputs to pan or orbit but still allow to zoom and select objects in the floating viewport.
If I hover the mouse where the menu should be as normal place, the options light up blue like I am over it - except the visual menu is bigger and further right on the screen (I put pics and setup info below because the setup is unusual).
Setup info: Normal laptop on the right (1920x1080) and iPad as monitor on the left (2388x1668). I use the software EasyCanvasPro to use the iPad as a monitor which also supports the Apple Pen pressure sens, and I have not had this issue in other programs like Photoshop, Adobe XD, Word or Powerpoint etc. I have a Tourbox accessibility item and X-Button Mouse Control, but neither have caused problem with 3DS Max before.
3DS max is set to use the dGPU in the Windows graphics settings (2080ti max-q). I don't know if EasyCanvasPro display functions actually count as "monitor" to the dGPU because settings in NVidia Control Centre say there's only internal display attached to the system, but Windows display settings can see and identify both of them. Also with this method, f.lux does not work on the iPad screen itself, so I think Windows can see it but other programs/dGPU cannot see it fully? If I use HDMI or USB-C dummy plug to make a virtual monitor then NVidia recognises it as a monitor, but it is very laggy to use the dummy display with EasyCanvasPro instead of EasyCanvasPro's built in "extend display".
1st pic: Mouse over where drop menu should be, it shows really big and far away but still lights up
2nd pic: Windows identifying both displays, and display settings for iPad
3rd pic: Drop menu appears half off screen at far right, all the other menus after that one I can't see but I assume they are beyond the edge of display
4th pic: screenshot from iPad at original resolution (blurry because I compressed to be less than 5mb to post it), UI strip on left side is from EasyCanvasPro
Again sorry if there is already solution, but I don't know the words to find it 😅
