Specifies whether a information from prior status updates should be displayed on the status update form.
From the Advanced tab in the section settings dialog you are able to specify the Prior Field value.

The following options are available:
Do not show - do not show the prior valueButton to show - show a button that can display the prior valueAlways show - show the prior value on the formIf Do not show is selected then information from the prior status update will not be displayed.

If Button to show is selected then a button to show the prior value will be displayed.

If Always show is selected then then the prior value will be displayed.

Clicking on the << button will copy the prior value into the entry field.