PictureFrame > EmbedBitmap=Yes the default ! I know it is supposed to be sticky once it’s set, but on every new install it is set to No. There is no reason in this day and age not to store the image in the file. If the user is really worried about file size then they can go in and set it to No.
It’s really easy to overlook this option due to the order of things - first, you choose the bitmap in the file dialog, then immediately you get the screen pick prompts to set the image - it’s easy to miss the command line options, and once you have terminated the setting the image, well, all the options are gone… You have no idea if the image is embedded or not.
As a corollary - I would like a somewhat more obvious way of post-saving a non-embedded bitmap in a file. Going into Doc Properties > Rendering and checking “Save support files in 3dm file” is not that obvious (to me at least); also the trick of re-doing the picture frame operation (with embed=yes), saving the file, then undoing the import is also not that obvious… How about EmbedPictureFrameImage…?