I'm using foxit reader on Ubuntu 16.04, but the font size for menus, toolbar, etc. is so incredibly small that I have to actually move closer and squint to read it. In the preferences, there is a section where I can change the font size to 13, 14, or 15, but even 15 is hard to read.
How can I manually change the font size of the GUI just for Foxit Reader? I don't need to increase the size of any other apps, really.