
Grid mode actually provides two options, Absolute Grid and Relative Grid. Spot mode can be useful when you need to re-position a back to its original location. When a clip is recorded, it takes on the timestamp of its location on the timeline. You can choose whether the clip start, end or sync point snaps to the specified location, or snap a clip by its timestamp. Any timebase can be used, including Minutes & Seconds, Timecode, Bars & Beats, Samples and Feet & Frames. When clicking on a clip, or dragging it from the Clip List in Spot mode, the Spot dialogue appears, allowing you to enter a time location. Spot mode provides a way to place clips at precise timeline locations. When clips are deleted from the timeline in Slip mode, a gap will be left. Clips do not automatically snap to one another as they do in Shuffle mode. In Slip mode, you can freely move clips around the timeline with no constraints. Shuffle mode is useful when you want to remove clips and automatically close the gaps. When clips are deleted from the timeline in Shuffle mode, subsequent clips will move left by the duration of the removed clips. Moved clips will always snap to the boundary of the next or previous clip, or the session start. Shuffle mode allows you to move clips around, but their movement is constrained by other clips on the timeline.

The edit mode affects how clips are placed and edited on the timeline.
#Pro tools recording pro
Pro Tools has 4 edit modes: Shuffle, Slip, Spot and Grid.
