The first step in adding a new listing is that you will need to select the property class for your listing. You must be certain which property class you want your new listing to belong to before creating it as you cannot change it after the listing is created. You will also need to provide a Listing Title, and select which Agent the new listing belongs to, both of these items can be changed later.
Once you have provided all 3 items and click [Submit], you will be taken to the full Edit Listing page where you will add all the rest of the listing's data, any images, vtours or files via the Media widget. (See the Editing Listings section of the documentation for more info).