Select an area by automatically detecting shape contours where clicked.
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.
Tolerance: Power threshold relative to the clicked position defining the boundaries of the auto-detected shape.
Maximum Width: Maximum time range in seconds of the auto-detected shape.
Sample All Layers: Use all layers to perform the shape detection, not just the active layer.
