Attached to this page are commonly-used images in the Bitbucket documentation.
You can insert the images directly into a page — there's no need to attach them to the page itself. Here is an example of how to do that:
Sarah, for my purposes, I don't find that technique very useful as it created more UI steps. Thanks for the tip though I can use that at the content pages and I didn't know about the Attachments Macro.