Are you just starting out with xDesign? The Training section of MySolidWorks can be of assistance. Check out the training materials available for 3DEXPERIENCE users.

https://my.solidworks.com/training/path/84/3d-creator-xdesign-fundamentals

xDesign is the 3DEXPERIENCE app that allows for sketching, adding features, creating reference geometry, using patterns, editing models, and creating assemblies.