How to read a case diagram

Top views, side stickers, grey stickers and arrows.
Most last-layer diagrams are a top view: the 3x3 grid is the top face, and the thin bars around it are the top row of each side face, as if folded up. The bar at the bottom of the picture is the front.
T-perm. Arrows show where each piece goes: a double-headed arrow is a swap.
Checked by the engine: PLL T
OLL 45. Grey means 'any colour but the top colour': for OLL only orientation matters.
Checked by the engine: OLL OLL 45
An F2L case in 3D: grey pieces are not part of the case.
Checked by the engine: F2L F2L 1
  • •
    Grey stickers are masked: their colour does not matter for this step.
  • •
    Headlights: a side whose two corner stickers match. Bars: three matching stickers in a row on a side.
  • •
    In print, the 'B&W patterns' option adds hatching per colour so a mono printer keeps colours apart.