Replace Selection: Replace the current selection with a new selection.
Add to Selection: Add the new selection to the current selection (or press Shift).
Subtract from Selection: Subtract the new selection from the current selection (or press Alt).
Intersect with Selection: Intersect the new selection with the current selection (or press Shift+Alt). This will keep the common areas between the two selections.
Thickness: Defines the thickness of the selection around the transient.
Threshold: Power threshold relative to the clicked position defining the boundaries of the detected transient.
Sample All Layers: Use all layers to perform the transient detection, not just the active layer.
