File, Save
Save the show by going to Setup>Files>Save.
The show will be saved with the name you last gave it. If you have not yet saved the show with a name, you will be prompted to enter a show file name. Use only alphanumeric characters, and avoid symbols.
CAUTION: All data is stored internally in non-volatile memory. Do not switch off the power until any pending save operation is completed, or you may lose data. It is strongly advised that you make periodic backups of important data to an external memory stick using the export function.