Many things MS will zoom in/out with the scroll wheel if you hold Control whilst scrolling.
...and Ctrl+0 (that's zero) will bring it back to 100%
I didn't know that (but didn't think to look either). Occasionally I accidentally engage the zoom function on my touchpad and fix it by going back to the menu to put it on exactly 100%. Thanks

Edit: I should have mentioned that it's not just MS products that support this. e.g. Chrome and Irfanview (although I checked and it uses Ctrl+0 for something else)
Edited by Shonky (18/05/2012 21:46)
Edit Reason: Added more infor about non-MS
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Christian
#40104192 120Gb (no longer in my E36 M3, won't fit the E46 M3)