A Shapes button right of Text draws a rectangle, an ellipse, a line of
taps or an arrow in the pen's colour and width, with a fill colour of
its own; a hold, a secondary press or two quick clicks open its menu.
Text and Hide rectangles draw nothing on the page and show blue corners
while the pointer hovers over them; free text's red corner mark is
gone. Arrange moves and resizes shapes. The colour palette floats
below "+" again instead of reflowing the toolbar.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>