If you have multiple projects you can organize them with folders.
Click on the small folder to create a new file.
Enter a name and choose an appropriate icon.
Now you are able to add projects to your new created folder with drag and drop.
If you click on the edit button, you have the possibility to rename your folder or change the icon.
When you want to delete your folder, you have to remove all the projects within it first and then you can click on the button to delete.