I have put some pictures on pages. Now I want to put another picture on the next page but don't seem to be able to get a new page on the same document.
If I understand what you're asking, you can insert a page break. On a Mac you can press Command-Enter. On an iPhone you can touch where you want the break and choose Insert > Page Break. On an iPad you can press the + at the top of the keyboard and select Page Break.