.PPX File Extension
File TypeSerif PagePlus Template File
What is a PPX file?
Template for creating a new document (.PPP file) with PagePlus, a document design and publishing program; includes a predesigned layout that can be used to create multiple documents with a similar appearance.
To create a PagePlus publication from a design template, select "File→New from Startup Wizard..." then click "Use a design template."
NOTE: Serif discontinued PagePlus and replaced it with Affinity Publisher in 2019.