(Issue #3715) Add spacer element to control margin/padding
(Issue #3715) added comments to zooming
(Issue #3715) adjusted spacing
(Issue #3715) better ascii art
(Issue #3715) cache margin calculation to avoid scaling all pages on new page load
(Issue #3715) cleanup
(Issue #3715) Handle out-of-order xhr completions
(Issue #3715) followup from review
(Issue #3715) Adjust docs on method
Merge pull request #3715 from sathomas/issue3715

Document Preview Margin/Padding Problems