changing font size - Joomla! Forum - community, help and support

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i see lots of stuff here on this, nothing specific want. on 'ol rhuk_solarflare template want change body text globally content items. see body tag in css 11px size, doesn't changes content size. tried using html button in my  tinymcewysiwyg editor add {font-size: 12 px} locally  html button doesn't bring html of content - blank window in firefox. why blank window?

why blank window?
blocking popups?





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