Spread page with 3 customize page size document

[g_prompt]

Hello, I am trying to make a cover design compose of the back cover (size: 8.25" x 10.5"), a spine or backbone (size: 0.25" x 10.5"), and a front cover (size:8.25" x 10.5"). This pages should be stick together so it make look a one spread. I am trying to find ways how to do it. Can you help me how? I can only make two-page spread.

[Dazmondo77]

3 hours ago, g_prompt said:

Hello, I am trying to make a cover design compose of the back cover (size: 8.25" x 10.5"), a spine or backbone (size: 0.25" x 10.5"), and a front cover (size:8.25" x 10.5"). This pages should be stick together so it make look a one spread. I am trying to find ways how to do it. Can you help me how? I can only make two-page spread.

That's the way I've always worked - also same for multifold leaflets and brochures

Not currently do-able in Publisher we're currently stuck with 2 pages - I'm guessing they'll add it eventually as it's a standard way of working for a lot of designers

The workaround is to do it all on 1 page - unfortunately we currently have no printable slug area so you'll need to increase your page size to accommodate manual trim and fold marks maybe on a master page and save as a template