Cylindrical picture, [227].
D
Depths, How to measure by diagonals, [127], [128].
Diagonals, [45], [124], [125], [126].
Disproportion, How to correct, [35], [118], [157].
Distance, [16], [77], [78], [85], [87], [103], [128].
Distorted perspective, How to correct, [118].