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3.5 Adjusting Displays in a VideoWall
3.5.2 Adjusting Position and Size (Zoom)
The Position control moves the "viewport" and moves the image within the viewport. The size of the
image depends on both the Mode and the Zoom setting.
Position has two parts: moving the image and
moving the viewport. When the image does not
fill the whole screen, such as a 4x3 image in the
middle of the 16x9 screen, the viewport is the
active area of the screen. The rest of the screen
is filled with either black or blue. You can use
the Position control to move the viewport with-
in the screen. You can also move the image
within the viewport.
To move the image or the viewport, press
> Position. In this Position menu, all
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the arrow buttons move the image, as you
would expect. Press
moving the image and the viewport. Holding an
arrow button moves the image or viewport
continuously.
To change the viewport border color, go to
Misc Control > Viewport Color and press
to switch between blue and black.
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For computer sources, if the image is expand-
ed to fit a 2x2 wall, each click moves the image
2 pixels. For a 3x3 wall, each click moves 3
pixels, either horizontally or vertically.
For video sources, the vertical movement is
always one times the expansion factor. Thus, a
picture that is expanded vertically 4 times, as in
a 4x4 wall, the picture moves is steps of three
pixels. For horizontal movement, the picture
always moves two times the expansion factor.
In a 4x4 wall, the picture would move in 4-pixel
increments vertically and 8-pixel increments
horizontally.
The Zoom menu controls the size of the image
on the screen, but it is not the only thing that
does this. In the Source Select menu, the
Format controls—Wide and Zoom for computer
3 - 32
to switch between
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sources; aspect ratio of video sources—also do
some zooming. And, of course, Big Picture
zooms in on the image.
To control zoom manually, open the Zoom
Factor menu by pressing
menu, the up-down arrows move the cursor
through all the choices and the left-right arrows
change the zoom amount.
To stretch the left side of the picture wider,
highlight Left and press the right arrow button.
This stretches the picture as though the right
side were glued in place and someone is pulling
on the left edge. To shrink the left side in, press
the left arrow button. To stretch the right side
in or out, holding the left side in place, highlight
Right and use the same arrow buttons.
Top and Bottom work the same way. There
is a tendency to use the wrong arrow buttons.
You naturally want to stretch the top of the
picture up by pressing the up arrow, but that
only moves you up one menu item.
If you want to stretch the image in both
directions at the same time, highlight Lock and
press
to put an x in it. Then the left and
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right arrow buttons will work on both sides (or
both top and bottom) as though the middle of
the image were glued in place.
Default reverts to "standard" zoom settings.
These will be affected by the state of the Wall
Processor. If Wall Mode is on, the Default is the
amount of expansion necessary to make a stan-
dard wall of the calculated size.
The W: and H: values shot the number of
original image pixels represented in the width
and height of the image. Therefore, these
numbers goes down as the image expands.
> Zoom. In this
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