BrechtDeMan
'Helping guideline' for sliders
To emphasise the relative position of sliders, a line extending across all axes and going through the slider currently being moved could appear whenever a slider is being dragged.
Optional, opt-in? (e.g. guideline="true")
Low priority.
I'm not sure what you mean here, or for what interfaces (I'm guessing APE).
That's right, and 'horizontal'.
See also this figure from Benjamin Pedersen "Hi-precision audio in listening tests - also in the browser?" 3rd Web Audio Conference, August 2017.
Just an idea, and keeping up with 'competition', not an actual user request.
OK, tried to quickly implement this and it was annoyingly hard, so will stash for another day!!
Since this is a visual aid I think perhaps it should be in the interface options node:
<interface>
<interfaceoption type="show" name="guidelines" />
</interface>