SQ KNOWLEDGE BASE
All guides, video workshops, and more.
http://help.squarespace.com

Building Pages & Using Layout Engine
Guide (with video) walk through of creating new pages, adding content blocks to pages, arranging the blocks, and more.

Using the Text Block
Includes info about 'paste as plain text', paragraph and line breaks, creating links, etc.

Using the Image Block
Includes info about how to add images to your page, how to prep images, add captions, links and more.

Using the Gallery Block
Includes info for how to add slideshows, slideshow settings, other gallery display options, and more.

Tips for Working with Images
Guidelines for how to prepare images for use in your webpages, and other info on working with images.