The note menu

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Answer

Right click a note, or hover it and press ⋯, to open its menu.

The note menu open on a Board card: Column, Select, Pin, Move to top, Duplicate, Copy text, Share, Delete
Item Does
Label (Column on the Board, Folder in Grid) Changes the note’s label.
Select Starts picking several notes.
Pin Keeps the note on top.
Move to top Moves it above the others.
Duplicate Makes a copy.
Copy text Copies the note.
Share Makes a link. See Share a note.
Delete Moves it to Trash.