考虑场景。 选择一个主题。 思考如何摆设。

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
Ask yourself about the occasion or incident prompting you to make a photo collage. Oftentimes, the occasion will guide you in choosing a theme or design for your collage.  Photo collages are often created for holiday decorations or gifts. For instance, you may create one to celebrate Mother's Day, Father's Day, an anniversary, bridal shower, baby shower, graduation, birthday, or major holiday like Christmas. Many collages created for such occasions include photographs and decorations that are th