To save changes made to a project, user has to press the ' Save' button from the top menu.
While the purpose is to prevent unintended changes in your wireframe being saved, MockFlow actually autosaves all your work in the background as revisions. So in case you forgot/unable to save your work, you can always use the "Revision History" for accessing and restoring your unsaved changes. Learn more from here.
- Saving in Windows: Ctrl+S
- Saving in Mac: Cmd+S
1From the project menu click on the "Save page."
2And also save the page by clicking on the "Save changes" button.