Right, if you're using FireFox right click the image and select 'Properties'. You'll get a screen like this:
Width is the first part of the dimensions (400 in this case) and height is the second part (140 in this case) giving: 400x140.
In Internet Explorer, right click the image and select Properties. You'll get a screen like this:
Dimensions (400x140 in this case) is Width: 400 and Height 140.
- Click
here to return to the rules.