I am transitioning from other design software and am struggling with differences in this software's behavior from what I have grown accustomed to.

In sketch mode, I have enabled the setting "Enable on-screen numeric input on entity creation" which (finally) allows me to rapidly dimension known variables without the pain of trying to carefully maintain cursor position while I enter values.

Once I have my shape, lets say a rectangle, dimensioned from this input, any number of other relations can completely nullify the fact that I have entered a specific value. I make a rectangle, 20x40 mm. If I then tell one edge of the rectangle to be collinear with another feature, It will re-size my rectangle moving only that line, and now my rectangle is no-longer 20x40mm.

This is rather frustrating.

I hope there is a setting to make a "dimensional input" act as a driving dimension, but I am unable to find the option to make this so, or the right search terms to discover it.

Any assistance would be appreciated.

Dave