There are several marks used by proofreaders.
Whether you meant a particular one, or were asking about the usual set of marks, see the 'related link' - which seems to have a few great links right near the top of the search results...
proof reading
Reading is the proof.
Proving that are pleasure in reading?
Inspector, proof, choke, etc..
Some symbols associated with reading include books, glasses, a library, a bookshelf, a bookmark, and an open book. Reading can also be represented by a cozy nook, a cup of tea, or a reading lamp.
Potato
Proof reading
yes, proof and reading
mostly no Cognitive process, reading is a thinking process. It is the way which symbols (words) are interpreted.
Thinking with symbols
represent ideas about what you have read.
Where it was made, proof marks, etc..