Open command ( File menu (Startup) or File menu (Graphics))
If there is a data set in memory which has been modified, you are asked if you want to save the changes - see the Close command.
Use this command to open an existing ATOMS data file. After the file has been read in, you are asked if you want to calculate immediately (this query can be eliminated with a checkbox in the Preferences dialog, Settings menu). If you reply OK, the structure will be plotted in the Graphics window. If you decline to calculate immediately, you can modify the structure or display parameters. When finished, use the Calculate command in the File menu.
You can create a new ATOMS data set with the New command, or import various kinds of files from
other software with the Import command.