Selection View of Highlight Tool


i have one question about your HighlightTool!

There is any way that the selection with die HighlightTool looks like the finally highlight annotation?



Pic2 shows the finally annotation and pic1 the selection with the tool before the MouseButtonUpEvent is called.
In pic1 you see that the letters are not full of black color more a little bit yellow. I hope you understand my problem.

Thanks for helping


Hi Daniel,

In order to do this, multiplicative blend mode would be needed. Right now, our WPF tools don’t come with that out of the box. WPF does not have a built in library for custom blend modes, but according to the following sources, it should be possible to do it with the pixel shader effects library from CodePlex ( and some of the stuff from here:

I am not sure how to achieve multiplicative blend mode using this, but it might be worth looking into.

We will be looking into it at some point in the future, but I am not sure when. So if you are interested in attempting it yurself, you could take a look at the above blog posts.

Best Regards,

Tomas Hofmann