Affinity Designer allows you to create (export) and open document templates, which typically contain placeholder picture frames and text. Templates have a .aftemplate file extension.
When saving a template, a preferred set of defaults will be saved with it. Text attributes, object properties, stroke/fill color, ruler and column guides, as well as grid setup, and more can be associated with a template.
From the New Document dialog, you can browse, preview, and search for existing document templates, as well as set up target template folders.
Template folders establish a 'target' folder in advance of exporting placeholder-rich files to it.
A file browser window will appear, allowing you to specify a folder location.
A pop-up dialog will appear, prompting you to enter a name and choose a location for your template. By default, the target template folder you set up previously will be used; if you navigate away from this folder and export, then this new folder location will be remembered on subsequent exports.