if you want to work in 720p then set your project to the HDV 720-24p (1280×720, 23.976 fps) setting. There is nothing to change after that.
Since I’m using Vegas 7, I gather that to replicate this setting, I’d just have to change the fps setting on one of the HDV 720 templates. Though now that I think about it I see no real reason why I shouldn’t just use the 30 fps default setting for my project… maybe if I was using a video transfer from motion picture film, I should use 24 fps video setting, but in my case I suspect it shouldn’t make any difference, I’d think.
Another question I just thought about.. since I’m using stills, I guess that technically a still photo that is higher resolution than 1280×720 (which is quite low resolution for photography) would not be any benefit for inclusion in a video render. The exception being, that if you wish to zoom in using a track control or video effect (which I do plan on doing), in which case, the larger resolution image will show the zoom-in with greater detail than a still made at the same resolution as the render, is this correct? I just want to make sure that when photos are taken for inclusion in a video project, that they are also shot accordingly for adequate use.
In other words, if I create a video project at 1280×720, then Vegas will not lessen the quality of a higher resolution photo when it is put up on the timeline, is this right?
Thank you again for your help.