Something that doesn't appear logical to me is to get "invert" and "profile editor" options when "C" is selected ?
(is it effective then ?… maybe i didn't try all the combination… but, … how can you "invert" or "increase/decrease" something that's "constant" ??)
Then, if what i say is not a nonsense, the first thing might be to grayish these options in the window when "C" is selected ?
… and for the button, the gray triangle in the background (that symbolizes the profile) is getting useless too…
( if I'm talking bullshits… just forget it
)
That said… why are you so mad about using a letter for that ?
… especially the letter "C" which is already used for something else within the timeline ??
(color layer )
… this "constant" option is actually very different from the others choices … it's more a "no" action than an action (?!)
… let's be different… use a symbol !
(why not ?)
So, let's find a symbol ?… to me, something "constant" is something flat… I would have seen a very simple line :
OR… if the idea is closer to "something null" ( a "none" option) … a simple "point" is probably the closest thing to a" zero"…
… and might also do the job (or maybe a dot line) :
Now, as you can see, I'm using a "middle tone" for the symbol's background…
… a gray between the "gray and white" that are part of the former background (profile representation)
… it can't be one nor the other…but something in the middle.
To me a very different color might just be a little more confusing and troublesome…
let's stay gray
… well, you asked for advice… that's mine