Quick Connect allows you to open an ad-hoc session by specifying the host and session type. This feature is accessible via the Quick Connect toolbar or in the View tab in Remote Desktop Manager macOS.
Note that the Quick Connect tool only lets you specify a host, a computer, and a session type.To have access to the other options available in the windowed version, you have to use the Quick Connect icon in the View tab.
When opening Quick Connect via the View tab, a window appears where you can specify your session Host, Username and Password.
Clicking on the first button next to the Host field opens yet another window where you will be able to select a computer to connect to in a list.
Clicking on the second button next to the Host field shows a menu where you can select your session type. It is also possible to create a Template and establish connection with it. See Quick Connect to learn more about this option. You can also learn how to create a template.