Video frame as reference image..?

Hi there. When you generate a video clip, once the clip is created it would be great to be able to move to the point in the clip you want to use as a reference for the next generation. Where it says “Modify” in the top left of the clip it would be great to have the option “Save fame as image” or “Use frame as reference image” etc. Then you could create the next clip from that frame, preserving the format… Regards.. Elliott