Point to Window -> Favorites in order to create a list of your favoured projects.
At the first start the Favorites list is empty:
Drag and drop your favorite projects into the list. The projects will of course also remain in your project manager.
You can now easily start a project by simply clicking on the project name in the favorites list. This makes it easy to switch between projects.
If you right-click on a list item, you see following menu with all kinds of functions.
If you decide to show the projects only with their symbol, the favorite list is very small and will not disturb on the desktop. Chose -> Display -> Show symbols only:
On the timebar you can also find a button for your favorite projects. If you click here, you get a drop down list of all your favorites.