Dimensions
1. Dimensions in sketch environment allow you to specify dimensions between entities such as lengths, radius etc. When you change dimensions, the size and shape of the sketch entities will change.
Depending on how you dimensions the part, you can preserve the design intent.
2. The software uses two type of dimensions:
Driving Dimensions
Driven Dimensions
Driving Dimensions
You create driving dimensions with the Dimension tool.
Driving dimensions change the size of the model when you edit their values.
Driven Dimensions
Some dimensions associated with the model are driven. You can create driven or reference dimensions, for informational purposes .
The Value of driven dimensions changes when you modify driving dimensions or relation in model.
You can not modify the values of driven dimensions directly unless you convert them to driving dimensions.
