The following guide summarizes the settings you will need to create a 22″ by 17″ (or 17″ by 22″) poster. It reviews how to save a background in PhotoShop (optional) and then how to create a correctly-sized InDesign document. The final step reviews how to save a file that can be printed using professional equipment.
Background dimensions in PhotoShop (optional, use only if you have an image background)
Step 1: Create a new PhotoShop canvas locked to these settings.
Step 2: Save the file so that you can place it into InDesign once you’ve created your poster document.
Poster dimensions in Adobe InDesign
Step 1: Create a new In Design Document.
Step 2: Use these dimensions and ensure that all options match below (margins/column settings can be ignored).
Exporting your final poster from InDesign
Step 1: File > Adobe PDF Presets > High Quality Print
Step 2: Save your file with your full name and document version number, etc… Match your settings exactly to mirror this window and click Export.