User's Manual

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Release both the Zoom in and Zoom out buttons, and the
magnification level returns to the rate you were using before
pressing the Zoom buttons.
7) Focus lock
By default, E-bot PRO uses automatic focus. However, if you’re
writing under the camera or doing something else on which you
don’t want the camera to focus, you can use the Focus lock to lock
the focus on the text rather than allowing the auto focus to follow
your hand or pen.
Press the Enter button on the wireless controller for more than 2
seconds.
When focus lock is activated, the Focus Lock icon is displayed on
the screen.