Highlight a part of the capture

[gligoran]

It would be really nice to have an option to highlight a part of the capture. This means that the selected part of the capture would be left as is, but the outside of it would be grayed out. This would be very useful in scenarios where you want to be able to focus the attention to one part of the capture, while still being able see the context of where that part is.

[yulolimum]

@gligoran
Interesting request. Do you have an example of this somewhere? I'd love to add this in with the next release.