Trying to update my profile with some build pictures and some finished pictures. How the heck do I take them from my pictures on my computer and load them?

When I email I simply cut and paste. Doesn't seem to work the same way here.

Not the most computer savy. I / my daaughter posted a picture for me on one of the questions about favorite pictures. Now I am at work (slow day) and I thight I would load them from my office. NO LUCK

Thanks,

mark
Naples, Florida