Rectangular Selection & Measurement#

Shift + Drag creates a rectangular marquee with real-time dimensions displayed in millimetres. Drag inside an existing marquee to reposition it without losing the size.

Cmd + C copies the selected region as a vector PDF — not a raster screenshot — so you can paste it into another document with no loss of quality.

This is the workflow for snipping equations, figures, or table fragments out of a typeset PDF for inclusion in slides or reviews.