Reached from the Main Menu. Native only; the web app has no settings.

• PNG export resolution - DPI when saving a PDF as PNG. Default 200.
• Processing time limit - how long one submission's scripts and image filters may run before it fails. Default 10 seconds.
• Max filter resolution - the largest pixel size an image filter is applied at. Default 1240.
• Generate debug.log - writes a trace of every submission, and an error-only error.log, next to the generated PDF. Off by default.
• Show Debug Log in Preview - adds a Processing Log button to the Output Preview. See Debugging. Off by default.
• Generate Preview Image(s) - adds a button to the preview that saves preview.png, preview2.png... into the project folder, replacing existing ones (up to 10 pages). Off by default.
• Resume last session on launch - reopens the last document and field values. It applies only to projects in My Projects, and an explicit path or -p preset on the command line overrides it. Off by default.
• Default Yatate files location and Default output location (desktop and iOS) - where Open File and Save As, and the preview's Save, start. They update as you use them.

The reset icon next to Save restores every setting except the two locations. Generated PDFs from every project go to one shared Yatate/Output folder inside your Documents folder.