As far as I can tell, it's not possible to put the Workflow actions on an issue edit screen, e.g. via adding them on the screen scheme. I imagine this is because Workflow is not a "field" per se, and can be set up to trigger its own screens, so they're not going to let you embed it on what is already a modal.
Example: while editing an issue I want to also set the issue to In Progress, QA Test, Resolved, etc....
Appears you have to set this from the basic, non-edit issue screen (which does not show all fields and can't be configured to do so).
Can anyone confirm this? If it's possible, what does one need to do to get it on the edit issue screen?