You can start Screem in the following ways:
Choose
Type screem, then press Return.
Upon starting Screem for the first time a blank HTML document will be presented. You can start editing this straight away, and save it to wherever you like.
You can preview the results within Screem without having to start up a web browser by using the menu. Choose the menu item..
Of course the real power of Screem comes not when working on individual files, but on complete projects, which Screem refers to as a site.