A single file can be attached to a checklist, which is visible on the mobile application to anyone that is performing that specific checklist. This is performed in the Checklist Manager for a chosen checklist, under the "Settings" tab.
An image file or PDF document can be attached.
For example, this attachment could be a document stating the Standard Operating Procedures for which the checklist states compliance. This could be useful in reducing the number of checklist items by replacing them with a summary question like, "Did you follow the SOP?"
See this video showing where an attachment can be viewed and changed, and how the attachment can be viewed in the mobile application. The area titled "Click to View PDF" is clicked, showing a new web browser tab that opens to show the document.