Hi, michael,
Sorry for the typo. i meant to say a rectangular "box" 24 inches tall.
Drawing the rectangular box with lines alone in 3d view was just to try and illustrate a point. Seems it was a bad example.
I'll check to see if i have any of my setiings wrong. If i do then i'll just have to use construction lines much more to get comfortable with it as Pilou mentioned. Otherwise i'll make a video to point out why i suggested inferencing as a feature.

Yes i was drawing the rectangle box with just the poly line tool in the 3d view. ( note that this is just to illustrate a point. ultimately to illuminate my reason for sugesting inferencing... i have no problem at all modeling any shape i want in moi).

I conceptualize a lot in 3d view only and almost always love to draw my lines/curves/shapes/solids manually in that view if i can help it.

Thanks
-isaac