I understand this question has probably been asked before, but how do you wrap a caption around inserted images? I'm not sure if there's a specific code snippet for captions or if it's a simple fix or something else.
I reckon the How To Write A SCP Guide has the answer you need.
Specifically, on tab 'Formatting' under the 'Placing An Image' section. I believe those instructions and code snippets are what you need.