You are making spacing decisions and need dense working sheets, not presentation pages.
Spacing & Kerning Worksheets
Four Letter pages built for the loop: print, mark, fix, print again. Control strings against running prose in two columns at 10pt, three narrow columns of running text at 9pt, a kerning pair list at 14pt, and a mixed roman-italic-bold page that tests the seams between styles.
4 pages · 2 & 3 columns · 9–14pt · roman + italic + bold
You want to see what a Hellbox document can do before building your own.
The Kitchen Sink
One document that touches most of the app: an alphabet, paragraphs at two, three, and four columns, spacing strings built on the placeholder syntax, a Goldilocks size comparison, and mixed styles in running text. Open it, swap your fonts in, and pull it apart.
9 sections · placeholder strings · Goldilocks grid · mixed styles
A .fontproof file opens in Hellbox. More proofs are coming; if there is a job you keep rebuilding a document for, tell us on the Discord.