A project is a collection of photographs. You can have only one project open in Tropy at any given time, which means that you cannot move photos from one project to another within Tropy. For that reason, it usually makes sense to conceive of a project in broad terms: a project as a book or thesis, not a chapter. You can use lists, tags, and/or notes to organize material within a Tropy project.
From the menu bar: Click on File > New > Project.
To change where your project is saved: By default, your project saves to your documents folder on your hard drive (My Documents in Windows, Documents in macOS, etc.).
To change where your project is saved, click on Change file name and location in the “Create new project” dialog box. Then select a new location. You can also rename the file so that the name of the project is different from the name of the file. Then click Save to return to the "Create new project" dialog box. When you have named your project, click Create project.
To find out where your project is saved: Once you are in Tropy, if you need to find out where your project is saved, right-click on its name in the sidebar and select Show project file.