To add highlight, just touch and hold at the start point of the texts that you want to add highlight, then drag to the end of the texts , release your finger and you will see a pop up menu. Simply tapping on one of the color options.
Note: You can only create highlights on EPUB files and text-based PDF files, not image-based PDF files.
Access the list of previously added highlights
There are 2 ways to access previously added highlights:
(1) While reading, you can access previously added highlights by tapping on the center of your device’s display, selecting “Go to” icon (the icon with 3 vertical dots and 3 lines), then tapping on “Annotations”.
(2) At bookshelf, you can access previously added highlights by
(i) doing a long press against a book cover at grib view, selecting "Detail" from the pop-up menu and then selecting “Annotations”;
(ii) swiping the list from right to left, selecting “Detail” and then selecting "Annotations" .
Edit highlighting color
To edit highlighting color, just tap on a previously added highlight, then choose a different color option.
When you are at the list of previously added annotations, swipe a highlight from right to left and then select “Delete”.