I'm used to viewing things like in Tessnip, where your changes are viewed in a seperate tree from skyrim.esm. How do I view all the changes, and nothing but the changes I've made from within the CK ?

Data > Select file > Details

Ok thanks for that - its a bit of help, but that window cannot be kept open. Let's say I intend to edit all the spells in game - the only way I can know which ones I have edited so far is open Select File> details and look? (which I bet only shows the changes that have been saved)