The Client Manager allows you to create new clients (and prospects) as well as work with existing ones.
Favourite clients
On the Client Manager screen, you can highlight the star 
to the left of one or more client names, then use the Starred filter A filter provides a quick way to display only selected clients, invoices, quotes and work in progress based on pre-defined criteria. Once a filter has been selected, it becomes the default title for the page. Page titles that are also filter names are shown in blue text with a drop-down arrow, at right. to display only those clients you are currently working with.