XODO

Having a feature wherein double tapping on a word immediately opens the dictionary pop-up showing the meaning of the word would be very helpful. You can provide different options as to what happens when a word is double tapped, like highlighting the word or opening the dictionary or underlining the word, etc. By providing options such as this will make it very handy for people who use these features very often.

I just realised that double tap already has a function of zooming in or out. I would then suggest that instead of double tapping, long pressing a word could act as a shortcut for those features.