Hide red bar atop glyphs in Edit View

anybody know how I can turn off the horizontal red (more like pink) bar that appears above the ascender line? I think it’s there to tell me that the masters are incompatible, but I’d like to not see it for now

well, I have done as you said, but I still have the eternal and constant red bar. the custom parameter rigmarole obviously doesn’t work, so why not give us the chance to change the colour, or reduce its opacity. we are visual people, and sensitive to visual things

Which version of the app are you using?