2D constraints
Set constraints and relations on objects in the drawing and control your drawings via parameters
It is possible to set relations between objects in the drawings and constraints on their parameters: co-axis, fixed dimension, parallel, tangent, etc. Thus, you can create a 'living' drawing, which is possible to change according to the rules you previously set.
Parameter Manager allows you to link dimensions and constraints by means of mathematic equations. Just change the numeric values, and the drawing will be dynamically changed in accordance with predetermined rules.

3D solid modelling
nanoCAD Pro provides you the Autodesk Inventor-style tool for 3D solid modelling
When you work in a 3D design environment there is a special 3d History window containing a Construction tree representing a history of model creation.
Construction tree is a sequence of features (actions) that create the model. 3d History is a nanoCAD Inspector window with a specific set of tools.

System requirements
Operating system: MS Windows® 10, MS Windows® 8, MS Windows® 7, MS Windows® Vista (SP1 or later) (64-bit only)
Processor: Intel Pentium® 4/AMD Athlon® or higher.
RAM: From 512 Mb, 2 Gb is recommended if you have big projects
Hard disk free space: About 300 Mb is required for full program installation, About 1-3Gb is required for working (according to the difficulty of projects)
Graphics: Video adapter with OpenGL or DirectX-compatible hardware 3D acceleration, Required resolution: 1024×768, Recommended resolution: 1280×1024 or higher
Additional hardware: Mouse or other pointing device

Home Page - https://nanocad.com/products/pro/