Microtek ArtixScan 4500t Reference Manual page 134

If you use the Edit feature, the ScanWizard Pro interface will appear with two
differences: the Scan button in the Preview button is replaced by the OK button;
and an additional button for choosing your image file format can be found in
the Scan Job window.
OK button in Preview
window (instead of
"Scan") shows that
you are in batch
scan mode.
Image file-format button in
Scan Job window
indicates you are in batch
scan mode.
Reference: The Scan Job Window 127