Flash environment
THE DOCUMENT WINDOW
The Document window is the worktable of the Flash project. This window tells what document (.fla) is currently active. When we open or create a new Flash file, a new Document window appears on the screen.
The default document settings of Flash automatically create new documents with a size of 550 x400 pixels, a white background color, and a frame rate of 24. All these attributes are displayed in the Properties panel and can be changed at any time. Clicking the Edit button in the Properties section of the Properties panel launches the Document Properties dialog box, where we can enter a custom size.