When you press alt and middle mouse, the screen should rotate, but it does not work. Moving the screen by clicking the middle mouse also does not work. When I press alt, a line is drawn under each capital letter of the words in the top bar (File, Edit, Tools...). Why is this? I used a translator. Sorry for not being smooth. I'm really in a hurry.
https://forums.autodesk.com/t5/3ds-max-forum/can-t-move-my-viewport-camera/m-p/8362746#M165394
I also referred to this article, but the settings are the same.
