[feature] stackable highlight

[marcelmarien]

When I have already read a text, having marked important passages, I sometimes want to re-read it again marking passages with a "fresh eye" without loosing the previous work.

It would be great if there was a feature like "stackable highlights".

• the user chooses a colour spectrum between colour1 and colour2. The colour spectrum is then automatically graded into i.e. 10 explicit shades
• the user can highlight text during a 1st reading session
• the user can blend out the highlights (while keeping them internally). This is important, because in a subsequent reading session attention shouldn't be guided by the visual traces of a previous reading session, but again by only the text itself and its factual mental processing.
• the user can highlight text during a subsequent reading session
• etc.
• the user can blend in the highlights as stacked upon each other: text only highlighted once will be marked in colour1, whereever highlights from different sessions overlap a shade closer to colour2 will be chosen, depending on how much overlap there has been created in the different reading sessions.

This way it becomes possible to visualize what passages have repeatedly caught attention and distinguish them from those which caught only passing attention. In a way this is visualizing the workings of one's mind.