resize problem

I don't know if you're working on macOS or Windows, but you could check if the OS text size is too big. It seems to me that the texts are huge.

Just wanted to add to this. I'm having a similar problem where I have to resize this every time i open after effects due to the menus being too small. It 'clicks' into place when I resize (it has to be resized just offset to the actual normal resizing grabber). Also using a 4k (benq though). Perhaps it's a 4k resolution problem? 

There is a minimum size for each column just as their is a mximum as well as an overall maximum for the left pane. You cannot resize anything beyond those limits.

Mylenium