Thank you Ninno.

I keep learning more from the forum.

To make the png picture, option/grid can turn off the grid and axis. There is a script somewhere to assist with turning them off, and back on.
For a smaller png, the object can be "small" on the screen, or the png can be edited later with some photo tool program.

The windows7 snipping tool will make a png, or...

Snapshot will make a png, which can be made smaller.

The Microsoft Picture Manager which comes with Office2010 is convenient to edit the png. There are lots of such programs.

- Brian

ps: And then put the .png and the .3dm in the objects folder, as previously mentioned.

pps: The final png keeps being cropped on the left, so it should have space on the left, and be more or less square???