Toshiba BA400 Series Key Operation Specification page 24

(9) While the result of fine adjusted threshold setting is shown, pressing the [FEED] key returns the screen to
the threshold fine adjustment screen and pressing the [PAUSE] key shows the details of the result.
(10) During a threshold setting, the media is fed at the same speed with that for the previous issue.
(11) Canceling from the threshold setting screen
You can change to the PAUSE screen by pressing the [FEED] key + [PAUSE] key from the threshold
setting screen.
(12) It is not possible to confirm whether threshold values 1 to 5 have already been set.
(13) When auto calibration is enabled, manual threshold setting is disabled.
Also, when changing from auto calibration valid to invalid, set the manual threshold.
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