The first step to dehydrating is preparing the fruit. I cored these tasty Winesap apples. As you might notice, some of my holes aren't exact circles--my aim was a little bad!
Then you slice the apples and put them on a dehydrator sheet. Note the size of the apples and how they cover the entire sheet.
Dehydrating is a long process.
Here's what the apples look like when they come out of the dehydrator. They are definitely a lot smaller once they've lost their water.