Got a question. I've got a cell in my mod which says I've altered it, which I'm sure I haven't. Which means I'm worried I accidentally rotated or shifted a tree slightly and want to 'clean' it. Is there any way to do so?
Under File > Data Select your esp file > click Details
Go through the list and you can remove by clicking on cells you may have altered by accident. Select item, hit delete, warning will pop up. You'll see a little 'I' next to the id. Reload esp and CK and it should be gone completely.
Oh yeah, back up your esp file in case you actually delete/ignore something you did not want to change. It's permanent so there is no going back.
Where you load your mod there is a option to view its details. On that window you can use the delete key to ignore changes you've made but don't want. Like ignore Cell -8, -2 should reset that cell and delete its past changes the next time you save.