Select [File] – [Save] or click the ‘Save’ 
icon to save the current page. If the page to be saved is to be newly saved, it will be saved in “*.pgx” format in the project folder.
When you save the page, it may take a while according to the system’s performance or the project’s size.
Hotkey: Ctrl + S, Alt + F + S
Saved files can be found in the project folder.