By introducing this extension, you can delete only the display part of the memo. Currently, Udemy applications cannot turn off the "10 people have written a note here.". Therefore, this defect leads to poor learning efficiency for the following reasons: 1. Subtitles are blocked by displaying memos 2. If you accidentally press the display of the memo, it will be displayed and your concentration will be reduced. This extension supports even if there are multiple memos displayed. Let's have a comfortable udemy learning life!!