Weaselboy wrote above:
"I can option-command-+ to enlarge text and the next time I visit the site, it is still enlarged. I am on Safari 10 with Sierra."
I have only a "test copy" of Sierra installed (not my "general use" OS at the moment).
I opened Safari 10 to a page I visit, and tried the "command/option/+" key combo.
I found that it enlarged EVERY font size on the page, both smaller AND larger-sized fonts.
This isn't what I was looking for.
Rather, I just wanted to do what the option in previous versions of Safari did:
That is to say, make the smallest versions larger (to a minimum specified size), while leaving larger font sizes unchanged.
The terminal command:
defaults write com.apple.Safari com.apple.Safari.ContentPageGroupIdentifier.WebKit2MinimumFontSize -int 14
... actually DOES THIS.
It will make the smallest sizes larger (to the minimum size specified, and at the same time, DOES NOT CHANGE the font sizes that are already larger than the minimum.
As I mentioned above, I can't understand why Apple's software engineers took this option out of the Safari preferences menu.
What happened to the idea of giving users "the power to be our best"?