Show all screen sizes
If enabled, display modes for all screen sizes will be available to choose.
Show all frame rates
If enabled, display modes for all frame rates will be available to choose.
These options are used when the image is rendered as snapshot.
If enabled, the background will be drawn in the image composition.
If enabled, the video will be drawn in the image composition.
If enabled, overlays will be drawn in the image composition.
Use external keying
If enabled, external keying will be used, if the card supports it.
Otherwise, internal keying is used.
Please notice that Internal keying, external keying, and HD keying are not available in all Blackmagic cards.