Does this rollover/mouse over effect have a specific name?

Caporegime
Joined
9 May 2004
Posts
28,628
Location
Leafy outskirts of London
I've seen a few sites in the past that had a vertical line rollover effect that would let you compare 2 images.

Usually it would be a picture of a celebrity now compared to a pic of them 10 years ago, and moving your mouse over the image will create a vertical line with each image on either side that you could slide back and forth. The line is always where your cursor is.

I've also seen similar with pre and post-airbrushing comparisons.

Problem is I don't know what it is actually called. Normal rollover/mouse over effects aren't the same from all the googling I have done.

Anyone know?
 
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