Doh!
Preview is using what you Coded, that is why it is called 'Preview'
I code (for my own use) for my Astak (RMSDK with thse side block numbers) so a zoom level of 3 is my standard with the block #'s remaining small
Code:
body{ 1.2em; margin: 0 16px 0 2px}
p {text-indent:1.5em;