Freedom Scientific TOPAZ OCR, Руководство пользователя

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14 Video Magnifier
Locking Camera Focus
Focus lock keeps the camera focused on the item you are viewing instead of
trying to automatically focus on your hand, or any other item that passes in
front of the camera. This is useful when working or writing directly under the
camera.
To use Focus Lock, do the following:
1. Press the red Focus Lock button once to turn on Focus Lock.
The padlock icon appears on the screen:
2. Press the button a second time to turn off Focus Lock, and restore
automatic focus.