Thanks for the information about printers. I did not know that. However, I don't think many printers in my area know that either. Most, if not all, will ask for hi-resolution imagery in at least 300 DPI, not the same thing as 300 PPI, I am finding out.
So, does anybody know if there is an effective maximum size of file, or resolution of picture, before Scribus will not show it? I have been told I may not have enough RAM to run Scribus properly, or at least not with many pictures. I have a very new Macbook Pro (Retina) with 16 Gigabytes RAM, lots of hard disk space. Is this simply too small a laptop to run Scribus? I thought 16 GB was pretty good, but I could be wrong.
Reducing the resolution of the PNG file does seem to make a difference. I reduce from 600 DPI to 150 DPI, and quite suddenly the pics start appearing again. The actual file sizes range from 1 or 2 Mb on the small size at 150 DPI to 21 MB on the large size at 600 DPI. I am guessing somewhere between the small and the large files there is an optimum I should aim for. Does anybody know how to identify optimal file size and resolution for Scribus?
My thanks for your time.