Touching [S3] will open the Show Options dialog box. [S9] though [S12] switch you between the different setup options.
See Also:

If this value is non-zero, whenever a change to the show file has been made a checkpoint file (*.mqc) will be saved to disk at regular intervals. The Checkpoint file is saved in the same locations as the show file. The FILE|OPEN dialog box will allow you to open a Checkpoint file by changing the "Files of Type" combo. If you do open a Checkpoint file, you will do a SAVEAS the first time you choose SAVE. The Uber Status will show you when the last Checkpoint file was written. A value of 0 minutes disables checkpointing.
If your system crashes or you lose power, when you recover the Checkpoint file will be opened rather than the show file:

You will need to verify you want to continue working with the Checkpoint file or the real show file.
If you want a history of how your show has progressed as you build it, choose to Archive the show each time you save it. If you do this, a new *.mqb file will also be written when your show file is updated. The show file name will be appended with a serial number that will continue to increase as your show progresses. For example, if your show file is called MyShow.mqs, the first archive will be named MyShow_0001.mqb. The next time you save, another file will be added called MyShow_0002.mqb. The number will always increase, up to 9999, then loop. The total number of *.mqb files on your disk depends on the setting in [S5] # Backup to Keep. If the number is three (the default), after your forth save, you will have just three *.mqb files numbered 0002, 0003 and 0004. If you need to resort to one of these files, the File|Open dialog box's "Files of Type" combo box can be changed to show you backup files.
The location to where these archives are stored is either in the Show Folder or the Backup Folder. If, for instance, your show file is d:\MyShow.mqs and you choose the Show Folder option, a directory will be created called d:\MyShow Archives and it will contain serialized backups, such as d:\MyShow Archives\MyShow_0001.mqb. If you choose the Backup Folder, the serialized backups will reside directly in the folder you point to in [S6] Backup Save Folder.
Note:
None of these settings affect the creation of regular *.mqb Backup files. Regardless of what is setup, MyShow.mqb (un-serialized) will reside in the same location as MyShow.mqs.
Fear of a hard drive failure can be alleviated by setting up Mirrored Saves on external hard drive devices, such as a USB stick or mapped network drive. If you Enable this option and point to a valid directory, each time you save, a duplicate *.mqs file will saved on the external device.
This number determines the total number of serialized *.mqb files that will be saved when you select File|Backup from the File Menu and the number of archive *.mqb files as setup above. For more information on serialized file formats, see the Archive on Save topic above.
You can set the default location to where the serialized *.mqb files will be saved when you select File|Backup from the File Menu. When you choose File|Backup, you will be presented with the Browse for Folder dialog box:

Once you select a folder, your show file will be saved with the .mqb extension. If you need to resort to this file, the File|Open dialog box's "Files of Type" combo box can be changed to show you backup files.