Advanced functionality.
Left margin of the subimage within the source image.
╔═══════════╗ ║ ║ ║ ┌───┐ ║ ║ ↔ │ S │ ║ ║ └───┘ ║ ║ ║ ╚═══════════╝
See Implementation
Advanced functionality.
Left margin of the subimage within the source image.