You can't unpublish your entire project but you can unpublish specific sections of your project to limit what your audience can see. This is useful if there's something specific, like a course, that you don't want your audience to access.
Unpublish - Portal and Course
If you disable your Portal, your audience won't be able to access your Portal page and Courses.
Step 1 - Click on Build and select Launcher.
Step 2 - Click Edit
Step 3 - Click Add Portals, then remove the Portal (click 'X'). Don't worry, you easily re-add it whenever you want.
You'll see "No items" display in the field.
Step 4 - Save your changes.
Unpublish - Course Only
If you disable one or more of your Courses, your audience will still be able to access your Portal page including your resources (videos, documents, links etc.)
Step 1 - Click on Build and select Portals.
Step 2 - Click Edit
Step 3 - Click Add Courses, then remove the specific Course (click 'X'). Don't worry, you easily re-add it whenever you want.
You'll see "No items" display in the field.
Step 4 - Save your changes.