However, when you've got a section view, cut cylinders appear as rectangles, composed of straight edges, and the only way to add the diameter/radius symbols is to add them manually (U+2300 for the diameter symbol, for example). You can't use the above commands, because they require circular edges, and the length/vertical/horizontal dimensions won't recognize that it originated from a cylinder or cone, and won't add it for you.
The reason why this is important is for many parts, it is much easier to add all the diameters in the section view, instead of in the full view, because all the lines would cross in the full view, plus you might need a top and bottom view to show all the details.
Here's an example of a partially dimensioned drawing of a real part As you can see, there's a lot of diameters that appear in the section view that would be extremely problematic to add to the other view
My proposal would be to have TechDraw track what geometry created the rectangle, and if it was a circular edge/face and if the section passes through the center of that circular edge/face, and you selected length/horizontal/vertical dimension, have it add the diameter symbol automatically
The main advantages of this would be:
- Less human error, since the user does not need to manually add the diameter symbol to each of the dimensions that required it (and so can't forget to add it)
- The user does not need to go find the symbol elsewhere and copy it (either in an actual diameter dimension, or on the OS character map)
- There's a reduction in the time needed to make the drawing. It's not uncommon that the time needed to properly make a drawing exceeds the time required to model the part in 3D
