As described in the chapter Creating an managing backups, you have the option to create backups of your HD records. You can attach these backups to the HD store in order to virtually extend the time period that is stored in the HD store.

If a backup has been attached to an HD store, the function Show appended signals is available.

This function may be useful if the backup also contains signals that are not included in the active HD store (e.g. because they were deleted after the backup). If you enable the function, these signals are shown. If you do not enable the function, then only the signals from the HD store are shown.

To enable the display of the appended signals, perform a right mouse click with depressed <SHIFT> key in the HD signal tree window. The context menu now contains (contrary to the simple right mouse click) the option Appended signals.