Is there any way to change the background colour for a specific portion of text in omnigraffle? To simulate selecting or highlighting? The text inspector background colour doesn’t seem to do anything?
The background colour doesn’t change when choosing a colour.
Could be a bit offtopic, but those working with source code might enjoy the highlight command line tool. It does automated syntax highlighting of clipboard content into different formats such as rtf, which OmniGraffle supports out of the box.