WhenDid.io action buttons are organized into Groups. New groups can be created with a single click.

To create a new group, simple click the giant Add New Group button. The new group will appear at the bottom of the group list (in the same position as the Add New Group button.

As soon as the new group has been created, its task pane will open where it's name can be edited or where its color can be changed. Click the Save button or press the Enter key on your keyboard to save your changes and make them live.