From what I have read in older messages, this is a feature that used to be available when creating some sketch objects. But, it does not seem to be avaiable any more. E.g, I saw a reference to automatically dimensioning a cirlce by choosing that option in the property area when it was in the process of being created. But, that is not available on my screen.
Note that the automatically constrain tends to do a lot of things that I don't want. So, that is not the specific feature I am seeking.
I imagine there are only limited times where such a feature would be desirable Such, as the creation of a circle, where you typically have a specific dimension in mind. Drawing a rectangle is another instance where I think I would commonly use it.
I realize that I am likely overlooking an existing feature. But, my efforts to find it in the help file and on the forum have been fruitless.