Current MATE on Ubuntu 18.04 LTS. How does one adjust the font sizes set by the window manager defaults in an application? Most of the applications (including the licensed-for-fee PDF Studio Pro current) have GUI command fonts (and the buttons upon which these commands appears, such as "file") that are too small. Using MATE tweak, and others, I have changed default fonts, but this only changes some of the widget tags (e.g., "file"). Is there a command/GUI application that shows which font an application is using by default, and also to change these (particularly the point size)?