Keynotes keep drawings clean. The designer puts a short tag at the item and writes the full note once in the keynote list.
Example: a tag on a gym floor plan points to a keynote that reads basketball backstop, ceiling suspended, see specification. The tag appears at each backstop.
Read the keynote list on every sheet in your area, then find each tag on the drawing. Count the tags for your items. Keynote numbers can mean different things on different sheets, so check the list each time. Some keynotes say by others or not in contract.