Stephanie, just keep adding images one after, your upload button changes to "Add Another Photo" You can even make 2-3 images in row. I always hit the preview button first to see how the images and words line up and from there you can move things around to fix them before actually submitting the post.
Your image links start and end with the word 'lightbox' between the brackets. To put images side by side, you just put the two or three links side by side. Since they automatically load with the links stacked on top of each other, you just put your mouse curser at the very end of the first image bracket and delete the space and it will pop up the second and third image links right next to each other.
None of these are my images, these are plants I won on the Lily Auction and they will arrive in the next couple of months.
Kimberly Wolf-Linda Agin--Spacecoast Small Talk