nested labels

Heavy Gmail label users will appreciate the latest experimental feature, available in Gmail Labs: Nested Labels, which let you organize your inbox into as many categories and subcategories as you like. To enable it, open Settings – Gmail Labs, and enable the “Nested Labels” option. Now, if you want to create a child label – or a subfolder, if you will – you must name it with slashes (/). For example, you can create a label named “Friends”....