Here is an example of a creation I made for a client for Halloween, using the artwork that comes bundled with PSE7 and presumably, with later versions of Elements.
The easiest way to create this is to start with the Organizer's Create tab and then click on Photo Collage.
Halloween-Girl-11.jpg
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HP h8-1360t Win7 Home Premium 64-bit/Intel i7-3770@3.40GHz/8GB RAM/NVIDIA GeForce GTX 1050/LG BH10LS30 Blu-ray RW+SD DVD/CD RW+LightScribe/52" Samsung LCD HDTV (ancient 1080p)/PRE & PSE & ORGANIZER 2018/CS 5.1 & 5.5 (rare use)