Notes

Text and commentary: text boxes, marks on the sheet's own text, callouts, leaders, sticky notes, stamps and signatures.

Notes tools put words on the sheet, or mark words the sheet already has. Nothing here is measured and nothing is traced: where Draw and Shapes mark where, these mark what about it.

• On the sheet's own text: Text Highlight, Underline and Strikeout. These only do anything on a sheet that has a text layer to select.
• Placing something new: Text Box, Callout, Sticky Note, Stamp, Signature.
• Pointing at something already written: Leader, an arrow with no label of its own.

Everything that carries text is born upright however the page is rotated, so a note on a rotated sheet reads the right way up rather than sideways with the drawing.