The Spawn New Window Suite features a unified interface, so using one Action is pretty much like using all the others.
Select the Freeway page (or external URL) using this drop-down. This page will open in the New Window
Window Width and Height define the size of the window
These define the position of the Window from the Top Left of the screen. The Centre Window on Screen button allows you to make the window open in the centre of the screen. NB – Safari will centre the window horizontally only.
The list of check boxes control whether the new window will have scroll bars, a tool bar and so on.
The Slave Chain drop down determines which Slave Chain the Action belongs to. You can set a particular instance of an Action as the Master Item for that chain.