Datavideo CG-100, User Manual

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Step5 : The image selecting panel is a
s follows
:
Image File path - shows the path of the image file
Open - to open a dialog box for image selection
Position - the position of the image
Size - the size of the image (pixel by pixel)
Alpha - the opacity of the image
Color Key - tick to enable color key function.
Key Color […] - to designate a color for keying, which
will become totally transparent.
The transparency of an image
When you set the transparency of an image, the setting is applied
to the whole image. The levels of transparency are from 0 to 255.
0 is fully transparent while 255 is fully opaque. If the image format
is targa 32 bit, then the transparency set here will multiply by the
files original alpha. (Note: Some applications such as Adobe
Photoshop allow users to create targa 32bit image.)
A Targa
Alpha=255 Alpha=85