Shortcuts
Drag image to move · drag handles to resize
Top-centre handle — shear: bottom corners stay pinned,
the top edge follows the pointer (Shift = height only)
Shift + corner — free ratio
Alt + corner — resize from centre
Shift while rotating — 15° snap
Scroll wheel — zoom at cursor
↑↓←→ nudge (Shift = 10px)
Ctrl+V paste · Del remove