Pass 1 · Box

Auto-box proposes cards, then fix them: click a box, drag its corner handles. + Box draws a new one — click the 3 corners you can see (any order); the 4th is inferred (drag it if perspective is steep). For a card running off the photo edge, zoom out and click the corner out in the margin. Zoom with the wheel; pan by dragging empty space. Del removes the selected box.