iPhone unhighlight

Where is it? Does it even exist? It shouldnt be that hard to unhighlight. Liner app has pretty easy option but Liner app doesnt have highlighting for pdf on mobile.
If I cant unhighlight with Mendeley on iPhone, then it leaves me with no room for mistakes. Thats unreasonable.
How to resolve it? Simple. Make Unhighlighting a breeze w/ no questions asked process.
I need that mobile pdf highlighter that I can the export those highlights into a CLEAN note form.

Elshootoe about Mendeley (PDF Reader), v2.9.4