I love the built-in support for simultaneous editing and viewing of markdown (e.g., readme.md) files in WebStorm 2016.3.
What I cannot seem to figure out is how to increase the font size of just the rendered (right-most section of the screen) portion of the markdown file.
I have turned on mouse-wheel font increase/decrease (hold Ctrl key while using the mouse wheel) which works really great on the left-side (raw markdown text), but has no effect on the rendered markdown (right-side). When I use the Ctrl+mouse wheel in that right-side of the side-by-side raw/rendered markdown windows, it just scrolls up and down.
This is an issue on my high resolution laptop and I would prefer not to make a global change (either to Windows 10 or throughout WebStorm), but if that's the only work-around for this issue, so be it.