You can see Display/Delete Relations drop down menu does not have "Fully Define Sketch" tool in 3D Sketch environment. Is there any particular reason for this?
This is speculation but I have never seen any designer define a 3D sketch with the level of dimension detail as that function tends to make (like the image below) which would lead to relatively few requests of the software design team to add that functionality. I don't even see an enhancement request for this which could mean you are the first to publicly express interest in having that.
It being an uncommon request means the software development team wouldn't put any time into a coding a 3D solver for the "Fully Define Sketch". Also, coding a 3D solver for this is likely much more complex than the 2D version that exists currently (and complexity is prone to failure).
What I usually do is, if I have a problem in fully defining a sketch, I use "Fully Define Sketch" tool and find out the dimensions I missed and later I delete dimension placed by "Fully Define Sketch" tool and define the sketch manually. In fact I am using "Fully Define Sketch" tool as a guide tool only.
That is why I want to know its availability in 3D sketch.
I see now. I checked and it is specifically disabled for 3D sketch (just do a command search for it when you are in the 3D sketch) so it may be something you want to get submitted in an enhancement request.
Now I know the reason why "Fully Define Sketch" tool is not in the 3D environment. Because there are situations where even if sketch is blue color, sketch can be a fully defined one.
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