Here’s another way to keep your murals tidy.
Select multiple sticky notes and set them to the same size in one shot. You'll have three options: (1) set them to the default sticky note size, (2) size them to the largest sticky note selected, or (3) size them to the smallest sticky note selected.
Multiple select sticky notes (hold SHIFT+click or hold SHIFT+drag cursor across to marquee select)
Select 'Resize' from the content toolbar hovering to the upper left of the sticky notes.
Choose from resize to default, biggest, or smallest
Now you can tidy up your murals and get them ready for a public presentation!