Suggestion for new posters who share

Hi I just wanted to suggest some small feedback regarding a post where it is required to hide the information.

Its not that intuitive to know to hide the post, and I checked the sticky on some of the different areas and couldnt see it putlinehow to hide certain information in a post.
Perhaps just a few lines in the Sticky which outlines how to do this?

Apologies if this has already been suggested.