N-up
Rows and columns of pages on a sheet, with the gaps, the margins and the marks under your control. For proofs, contact sheets and multi-page handouts.
Pick pages per sheet and the grid follows; the preview shows the exact placement.
Set the gutter between cells and the margin to the sheet edge in millimetres.
Cut lines and page badges in the preview make the sheet easy to check before printing.
The defaults come from your file. Change a setting and the proof updates before you let go of the mouse.