An editing mode found in Pro Tools software. Slip mode allows you to place an audio region anywhere you wish, independent of any grid or time code values. This mode is handy for all the other stuff you do in Pro Tools, particularly when it comes to working with regions that don’t have any relevance to the musical timing of the piece. Often times vocal and guitar tracks are comped with this mode. If you place a region over another region the first region will be cut off at the point where the new region starts and/or ends. The three other major editing modes in Pro Tools are Spot Mode, Grid Mode and Shuffle Mode.