i am new here…
how do i enhence two or more words in a sentence? or ’ how can i underline an expression, to find out its translation?

You can’t do that in the mobile app (at least not in the android version). In the web browser, you just select several words by dragging the mouse (or finger)

Actually, it is possible to highlight a sentence on the Android app too. Just long click on any word and option to highlight multiple words will show up. After highlighting, button will appear on the top right and you will be able to create a LingQ from highlighted sentence. Hope this helps!

thank you, i will try that…