Does have NX a "Features Recognition" option?
For example if I have an imported STEP body and I want thet NX genenerates the body as sketches, extrudes, fillets, ...
No.
However, the synchronous modeling tools are excellent for working with unparameterized bodies. There are commands to add dimensions to your model that will then work to drive the model parameters. Also, there is "edit cross section": which will create a set of curves through a section you define, the curves will then act as a sketch to drive changes to the model (works well on prismatic parts).
Uh No. What software are you getting the step body from? There is third party companies that will convert say solidworks to NX with full history support.
We provide no 'general solution' for the migration of part histories, however there are a couple of specific situations where we can provide that sort of capability, at least for a one-way conversion of data. If you would like to learn more, please contact a local Siemens PLM sales office or one of our partners. You can get more information at: