First of all, I want to give huge thanks to the Sumatra PDF team; it is lightweight yet has almost all the functions needed, and it has been a pleasure using this program.
I wanted to give some feedback about the highlighting feature provided in the pre-release version:
The highlighting works fine in most cases, but I wish I could undo highlighting more easily; highlighting on the same line can be sometimes buggy, confusing and time consuming. Making ‘ctrl+z’ for undoing and ‘ctrl+y’ for redoing would be awesome[Edited: I forgot that highlighting can be undone by reapplying it].
I’m personally fine with controlling the color via text file, especially if incorporating a color palette takes too much of computer resources. I still wish though that there was a simple way of alternating between different colors by, say, making about 3~5 rooms for different colors in the text file and then make them selectable through key combinations. This way, we can keep the program lightweight and still enjoy the convenience.
Highlighting texts can be somewhat buggy and bumpy especially when the line consists of some mathematical formulas.
Quite often, the space under the line gets highlighted as well.
It is not a huge deal since I can use ‘ctrl+mouse+h’ but still annoying. Also, the end of a hightlight is sometimes either too close to the end of the last word or too far away from it (highlighting the margins after the last word as well).
I wish ‘ctrl+s’ saves the changes on the same document rather than trying to save the file into a different place.
I’m still using Sumatra PDF since its concise set of features is unbeatable. I really wish that the highlighting feature will soon be on the release version with some inconveniences fixed since highlighting is just so darn useful!