Odd happening on Community Site

[#1]

For the last few days, when I select Community it all appears to have shrunk its display size such that the text is so small as to be hardly readable. The whole page is affected not just the text. I am using Firefox and Windows 7. Firefox headings are quite normal. I observe that I can type this message right across the message panel with text far longer than normal per  page.

[#2]

Try 'Ctrl'+

[#3]

...or 'Ctrl' 0 to restore defaults.
A little while ago I had this problem but don't recall reducing the text size by the use of 'Ctrl' -.

[#4]

Well done chaps!  One 'Ctrl' + increased things a bit; One 'Ctrl O a lot more. I can read things now without a magnifying glass. What do you think happened in the first place? I have not played with any of the Ctrl clever tricks to do anything before.  Repeated use of the ones quoted allow shrinking and expanding at will.
I am duly instructed.

[#5]

You may have held down CTRL whilst scrolling the mouse, that has the same effect of zooming in and out.

[#6]

Thanks Chris, I learned someting too
@ Strat, for some reason your correct and useful response made me think of the Two Ronnies "No, number O's" (due to having to think whether it was an 'O' or an '0') so I had a little chuckle too!

[#7]

Thanks Chris from me, that certainly works. I cannot think of any reason why I would press Ctrl when scrolling even if I thought that I was pressing Shift!! We live and learn (sometimes!!).
C.

[#8]

It could well be coincidence, and perhaps we both inadvertently held down CTRL whilst scrolling, but yesterday I had the very same issue with the forum - text much smaller than usual! A CTRL-0 reset things as per the above.
Mathew

[#9]

Could have been some external action or signal now that it seems to have been distributed to more than one of us!