EZWatch Pro 3.1 - Manual (Page 43)

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: This function is designed to zoom in (amplify) the video
display image. After you have screen zoomed in, you can
navigate the viewing area by holding down the left mouse key
on the screen.
: This function is designed to zoom out (shrink) the display
image. The video image zooms out at each click of the icon.
: This function is designed to return the image to its original
and default magnification.
Default: Pressing this will change the parameters to their default
settings.
Exit: Exits the Video Tools setting window.
: Takes a picture of the current screen and saves the image
in .bmp format. Click icons on the bottom of picture taken by
snapshot, will find more functions.