I can't resize an image by dragging and dropping in Notes.
How do I resize an image in Notes?
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In macOS, you can toggle between thumbnails and actual size (max width = 100%) by right-clicking any image in the note and choosing ‘View as Small Images’.
In iOS, hold an image to open the context menu, then choose View As → Small. Alternatively, tap the ellipsis button in the toolbar and choose Attachment Size → Small.
This works for me (and doesn't require any screenshots):