Ceiling height (cm)
Sofa width (cm)
Sofa back height (cm)
Picture width (cm)
Picture height (cm)
There is a sofa under it
Snap to the rule
Centre of the picture, cm above the floor:
Centre height
Gap above sofa
Width vs sofa
Drag the frame, or use the slider. The dashed line marks 145 cm. Rules of thumb, not laws: a high ceiling or a very low sofa can justify bending them.