Technical drawing: symmetrical component?

Question

i´m working on a technical drawing of a symmetrical element. one of my views includes a half section. do i have to represent the whole object, one half as a section, the other as seen externally; or can I just represent the section?

and, if there is no section included in a view, can i just draw half/a quarter of the object? how does it work with the entering of the measures?

i am so confused, if anyone would be willing to help, also per email, that would be great!

Answer 1

For clarity draw one side of symmetry as section and other side as projection.It will be impressing.

you can show only cross-section(the area you hatch) with note but you cant show all dimensions

Answer 2

what are you using for drafting...Autocad?