In addition to scrubbing the timeline, another way to test the movie is to preview the SWF. This will actually publish a .swf file to the same folder as the .fla document. The SWF file is the file that will play in the internet browser. It is the file which must be uploaded to the webserver upon completion of the project. Make sure you publish all relevant files as Flash will often create several companion files to help the .swf file work on a public web site. During the local preview, you will not need to concern yourself with companion files. Preview the SWF by pressing Control+Enter (Command+Return on a Mac). Or, select Control > Test Movie > Test.