In the Dropbox desktop app for Windows, the Preferences window, Selective Sync and Manage hard drive space have a fixed size. They cannot be resized or maximised.
With a large Dropbox, going through the folder lists in Selective Sync means a lot of scrolling in a small window, and longer folder names are cut off. It is hard to get an overview of what is selected, and when I needed to show support what I had selected, it took many screenshots of the same list.
Suggestion: make these ordinary resizable windows, so the folder lists can use the whole screen and show full folder names.