How does someone copy their logo to a photo?? I post a lot of photos on Facebook and on a Blog. And somehow people have been able to print my photos from Facebook and the Blog. Please Help!!!
This has been discussed numerous times here.
File / Export / Watermarking and choose your logo.
If people are printing your pictures from FB or blog, they're either really small or really poor quality - this assuming you don't post full-sized photos. In any case, there's nothing stopping anyone from printing them, and if you want to post pictures online you'll just have to live with that.
Note that slapping your watermark all over the photo will just aggravate most people (read: potential customers), and some don't want any kind of watermark on photos they view no matter how unobtrusive it is.