Sony DVS-7300 User Manual page 541

Selecting the speed of image movement produced by the VELO
HOLD button
There are three options for the maintained speed of image movement
produced by the VELO HOLD button, selected by pressing F7 (VELOCTY
HOLD) as follows.
×1:The image continues moving at the detected speed (the speed before you
removed your hand from the trackball or Z-ring)
/2: The image continues moving at 1/2 of the detected speed.
/4: The image continues moving at 1/4 of the detected speed.
Selecting the z-coordinate-dependent trackball response
There are two options for the relation between trackball response and the
position on the z-axis, selected by pressing F9 (XY MOVE SNSTVTY) as
follows.
CNSTNT (CONSTANT): The speed of image movement in response to the
trackball does not depend on the position along the z-axis.
DPNDZ (DEPEND ON Z): The speed of image movement in response to
the trackball increases as the position recedes into the distance (i.e. as the
z-coordinate increases).
This mode provides a lighter operating touch when carrying out a
transformation in the x- and y-directions on an image positioned well into the
screen (i.e. with a large z-coordinate).
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Chapter 14 Setup