To create folders or subfolders (labels), open swisscows.email and proceed as follows.

1. Click on "Settings" at the bottom left.
2. Under "Settings" click on "Folders".
3. Then click on "Create" in the top right-hand corner.
4. Under "Folder name" enter the name of the new folder, e.g. "Templates".
5. Click on "Save".

Done, the folder is created. And if you want to create a subfolder, the procedure is similar:

1. Click "Settings" in the bottom left corner.
2. Under "Settings" click on "Folder".
3. Then click on "Create" in the top right corner.
4. Under "Folder name" enter the name of the new folder, e.g. "Offers".
5. Under "Parent folder" tap on the desired folder, e.g. "Inbox".
6. Finally, click on "Save".

Done, below you can see the view of existing and newly created "Offers" subfolders.