Invisible tempo should have more visual contrast in input/edit mode

I often use massive tempo editing (sometimes on a note-by-note basis) to get a more meaningful rendering of my music. As these indications must not show in the printed score, I make them invisible; and in order to clean up a bit such a crowded workspace I use a small font size (8). This is fatal for poor vision, especially with small screens such as a in a laptop.
It is very logical that invisible features --including tempo-- be greyed out, but it is not necessary that when editing its value it be shown even lighter, reaching virtual invisibility. I think it would be better to use the blue font used in other text boxes, or green or other easily visible color to recall it is an invisible feature.

PD: I know one could make it visible while editing, but 1) it is one more step, 2) there is the risk of forgetting to turn it invisible again, and 3) when using the navigator the toggle may take half a second ore more, which is a bit cumbersome.