You can find the menu on the printer's control panel below.
Settings > General Settings > Fax Settings > Send Settings
Enable this to start sending the fax after you scan a document by tapping , and then wait for the next original until the time specified has passed.
Set the time to wait for the next original.
Enable this to start sending the fax after the specified time has passed without performing any operations after displaying the preview screen.
Specify the time to preview the scanned document before sending it.
, and then wait for the next original until the time specified has passed.