Open an existing bin file (the extension is .btx), or a composite file (the extension is .ctx) with Open.
Click File -> Open, or click on the toolbar, or press Ctrl+O, to pop up the following window:
Select a file type and a file, and click Open to open the file.
You can save a modified composite file with Save.
To save a modified composite file, click File -> Save, or click on the toolbar, or just press Ctrl+S.
This menu item closes the currently working file on the designer.
Click File -> Close, or click at the upper right corner, or press Ctrl+F4 to close a current file.
It closes all the active files on the designer.
Click File -> Close all to close all working files.
The item lists all recently opened bin files and composite files.
Click File -> Recent files to open a recently opened file directly. You don’t need to find the file through File -> Open.
Exit lets you exit the designer.
Click File -> Exit, or click at the upper right corner to exit the designer.