Remove a certain amount of characters from the beginning or end of a selected field.
If say I had some tracks which had the titles:
Track One-01-Album Track Two-02-Album Track Three-03-Album
Now as you can see for some reason the titles also contain the track number and album after each title name.
So I want to delete 9 characters from the end of the Title field.
This would leave:
Track One Track Two Track Three
So you set how many characters to delete (ie. 5, 7, 9), you set whether the characters to be deleted are at the start or at the end of the field (ie. end in the above example), and then you select which field it is to be deleted from (ie. Title, Album).
I hope this makes sense, I am not great at explaining things.