Edit Imposition: 21-up (3×7 portrait)

Name

Paper Size Across

Paper Size Down

N-up

Imposition Across (piece W)

Imposition Down (piece H)

No. Across to Print

No. Down to Print

Gutter Across

Gutter Down

Work & Turn — prints front + back on one plate, flips sheet for the back. Effective yield is halved (e.g. 4-up counts as 2-up).