Step 1: Create a document you want to share.
Step 2: Select the "Share Button" in the upper right
Step 3: Select "Embed" from the drop down
Step 4: Using the controls decide what dimensions (in pixels) you would like your FastFig document to be on your site. (This may take some experimentation).
Step 5: The HTML iFrame code is already highlighted for you. Copy it to your clipboard.
Step 6: Paste the HTML code you copied in Step 5 into your blog, website, or other application that accepts HTML snippets.
Blogs, LMS Systems, website applications, and others use a variety of methods for pasting HTML snippets such as this. Follow those products instructions as each site is unique. Hint: Searching the web for "How to input HTML into _______" can often be more helpful than the original instructions from those products.