The histogram and percentile limits are computed over a volume, not just the current 2D slice. A dim can be fully included in that volume (scoped), or only its current position counts. Dims that aren't fully included can either recompute limits when scrolled, or stay frozen. Click a dim to cycle: scoped → recompute → frozen.
IN SCOPE
Full range in volume. Scrolling doesn't change limits.
RECOMPUTE
Current position only. Scrolling recalculates limits.
FROZEN
Current position only. Limits stay fixed.