-choosing Highlighter transparency , some colours cannot be seen with current highliter on'em!

Make the highlighter work like the one in OneNote

It would be awesome to continue highlighting a region (after picking up the pen) without the highlighting getting darker and darker each time you pickup the stylus.

Also,

I was wondering you could do a quick update to the highlighter tool so that it creates a smoother, more accurate line?

To elaborate, when I am zoomed into a document, I can easily drag my stylus from start to finish, and there is a nice line.

However, when I am zoomed out to "fit width", 80% of the time I begin highlighting, the start / end points of the highlight seem to be curved or glitchy and don't start /end as a straight line. Its almost as if it thinks I am trying to draw something, rather than simply a straight line.

Option to deactivate color overlay of consecutive strokes in marker tool. So that it can render continuos regions. Like proffesional markers. It could be activated with a double tap or somethig to keep the interface simple.