How to get applications to display in a reasonable font size?
Using Fedora 27 (and 28) on my 4K laptop, occasionally an application shows text in a tiny typeface. For example, I finally got TDAmeritrade's thinkorswim to start (from this question). But it is unproductively small (shown overlaying the ask.fedoraproject screen):
A few other applications also exhibit this kind of behavior. For example, the Fedora repository's Ball Buster game (if this image seems confused, it is because it is doubly meta):
Neither of these apps seem to allow resizing, at least by dragging the window side/corner or double-clicking on the title bar: the action is either ignored or the apps already believe they are maximized.