Scribbles have to be converted from text to shapes when drawn, so drawing them is very graphically intense. All the speedups that come with fast text rendering go out the window. ^1
The text also needs to be converted into shapes for the purposes of mouse-hit testing.
^1 Actually there’s a possible optimisation here, maybe I can get away with just setting up a display transform instead. But drawing large blocks of text isn’t exactly fast either in GDI+…
I see. Basically what has almost always lead me to using Scribble instead of a Panel with transparent background color, is the fading… If there was a way to override the panel text fading or editing its proportion regarding the zoom value I would not need to use Scribble