I would like to propose a small change to how long pressing the F5 key is handled in the Step Program mode: I would like it to always activate the selected play area, even if some other area is already activated.
Considering that the normal key press either activates a one-measure play area or deactivates any active play area, I see no point in using long press for deactivation as well. Using it exclusively for (re-)activation could streamline the workflow.