Notes within cells – how are they displayed?
To create a Note for a cell, Insert -> Note is what is used. But to view it just upon hovering over the cell, instead of having to right-click on the cell and select “Show Note”, you need to enable the Tips selection. Do this by clicking on Help -> Tips. As long as the tick is displayed next to Tips, Notes for cells will always be displayed when the mouse hovers over the said cell.