Grain direction
A two-ended arrow for a documented reference direction.
Fold edge
A boundary line with two arrows pointing towards it.
Single alignment mark
One V-shaped alignment mark against a reference edge.
Double alignment mark
Two V-shaped alignment marks against a reference edge.
Centre reference
A dashed reference axis and a short transverse centre mark.
Seam offset
Two parallel angular paths with a perpendicular distance indicator.
Cut edge
A continuous angular outline used with an explicit cut-edge label.
Stitch path
A dashed curved path with distinct start and end markers.
Drill reference
A circular reference target; not a safe drilling instruction.
Pleat pair
A pair of fold references with arrows directed toward the middle.
Button position
A circular button position with two hole references.
Reference square
An uncalibrated square and side indicators for a labelled reference feature.