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How can I adjust text/display size in Comcast's Smartzone page(s)

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While reading the email page in Comcast's SmartZone (Zimbra), I accidently rolled the roll button on my mouse and everything on the page shrank to an unreadable size. Rolling again did nothing. Comcast support was unable to help. When I use Explorer to access the page, there is no problem. No other web pages seem to be affected.

While reading the email page in Comcast's SmartZone (Zimbra), I accidently rolled the roll button on my mouse and everything on the page shrank to an unreadable size. Rolling again did nothing. Comcast support was unable to help. When I use Explorer to access the page, there is no problem. No other web pages seem to be affected.

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{Ctrl + Scroll wheel} does a Page Zoom and that setting is saved domain by domain.

View > Zoom > Reset while you're viewing one of those zoomed-out pages in the SmartZone.

https://support.mozilla.com/en-US/kb/Page+Zoom