I took a day to try dig into GTK Inspector - a tool that seems only available on Linux. No worries! I gave Linux an install, DT, gtk3 tools, and tried to get Darktable working with it.
No luck getting GTK Inspector to launch with DT 
. I feel a bit lost here, is there a better way to ‘inspect element’ and see what DT widgets, text elements etc get what UI styling from where?
Are devs typically using sheer knowledge of the source code to make edits? Apologies if this is a hella dumb question.