The tool reads everything from the Illustrator file. Set it up once like this and the mockup builds itself.
Layers
◌INFO - DO NOT PRINT - WRAP 1.5in
◌BLEED - DO NOT PRINT
●ARTWORK
- ARTWORK: the art layer. Any name works: every layer prints except the ones marked DO NOT PRINT.
- Artboard: the front of the canvas plus 4 in of bleed on every side, to be safe (the least is the wrap depth plus 0.5 in that folds over the back). A 10 × 48 in canvas has an 18 × 56 in artboard. Fill it all with art: the bleed is what shows on the sides.
- BLEED - DO NOT PRINT: one rectangle the exact size of the front, where the front sits. The tool reads the width and height from it.
- Shortcut: the Canvas Bleeding script does both for you. Start with the artboard at the front size and run it (File › Scripts › Other Script). It is on the server in Designers › _templates › Pop Mockups Tool › Scripts.
- Wrap depth: the side depth of the stretcher bar. It is 1.5 in unless the file says otherwise. To set it from the file, write it in any layer name, for example
WRAP 1.5in, WRAP 4cm or DEPTH 38mm. You can always change it below.
- Notes and callouts: keep them on a layer with DO NOT PRINT in the name. Those layers never show in the mockup.
- Saving: File › Save As › Illustrator, and keep Create PDF Compatible File checked (it is on by default).
Files made the older way still work: artboard the size of the front, with the art running past it. If the art does not reach far enough, the missing part of each side is filled with a mirror of the front edge, and a note tells you.