Irfanview Zoom – How to Zoom-In Without Blurring the Image in Irfanview

Try option+control+scroll. (This works on the touchpad in a MacBook Pro. I don't have a Magic Mouse.)

You can do this as follows (I tried it with Firefox 10.0.2 here):

• Type about:config in the address bar
• Filter for toolkit.zoomManager.zoomValues

This will show you the various zoom "steps" the browser has. The steps are specified as decimal numbers (representing precentages of the original, so .3 means 30% of original), separated by a ,. See Tweak Firefox 3 full page zoom for the details.