Split at Locators is a function that works like a giant version of the scissors tool. Using it you can split all Parts on all non-muted Tracks. Actually it’s two cuts you make in one go, one at the Left and one at the Right Locator position.
Where Cut at Locators actually removes part of your music from the Arrangement, Split At Locators does not. It just splits several Parts at the same positions.• If you only want the Parts to be split in one place, set the Left and Right Locator to the same position.
P Muted Tracks are excluded from the operation.
An alternative splitting method (that will include muted Tracks), is simply to select all Parts and then split using the Scissor tool.