Step 1: use Firefox, and add the "Pixlr Grabber" plugin.
Step 2: Pixlr Grabber lets you take a snapshot of any portion of a web page - even stuff below the bottom of the screen.
Step 3: Take your screenshot, and select "Copy to clipboard"
Step 4: Waltz over to Confluence, and simply PASTE that screenshot into your wiki page. Resize as necessary.
Conversion process notes:
After three tries, I believe I have finally gotten it right, where all content in the 1.6 Docs that is meant to link internally is now actually doing so. But as you're editing docs, be on the lookout for content that links to anything in the "XNAT" spacekey.
Adding a news item to the sidebar is easy. Just select "Add > Blog Post" from the upper right menu. Or click here: https://wiki.xnat.org/pages/createblogpost.action?spaceKey=XNAT16
I'm setting up separate spaces for XNAT 1.5 docs and XNAT 1.6 docs, similarly to the way that Confluence sets up its own documentation. We're starting with a table of contents as they should be, rather than as they currently are. Therefore, there will be a lot of holes that need filling.