The underline tool has no selection for colors. The highlight tool has four colors yellow, green, blue, and pink. The last two controls let you copy the selected text and ask Cortana about the selected text. From left to write, the controls let you highlight text, underline text, and add a note. When text is selected, a floating bar appears just above it. To highlight text and ad notes to ePub files in Microsoft Edge, select a line or block of text. These features are all geared towards reading of course. You can now highlight text and add notes to ePub files in Microsoft Edge.

In the Creators Update, Edge was limited to just viewing an ePub file but with the Fall Creators Update, it’s added a few new features. The ePub format is reserved mostly for eReaders though you can probably find a desktop app that supports it nevertheless. ePub files normally have to be converted to a more desktop friendly format before you can read them on your computer. Microsoft baked this feature into Edge with the Creators Update when it also introduced books in the Windows Store. That’s something modern web browsers like Chrome and Firefox cannot do. Microsoft Edge isn’t just your average browser.

Windows 10 not highlighting files