Cool beans, glad it's improved things. I basically nicked the acceleration / deceleration algorithm from the accelstepper, and applied it to the short line segments that the straight line routine uses.
I would like to have a preview of the vector filter available, so maybe that'll be something I'll work on.
The outline box behaviour is like that by design, it was really designed to offer a kind of preview of the area that is selected rather than as a way of drawing a box, so there's no pen lift/drop behaviour. For drawing, I usually raise the pen, then issue the "draw box" command, and then, when the pen gets to the first point, I use the button on the screen to drop the pen while it's drawing. Or do it twice, once with the pen lifted, then drop the pen, and do it again.
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