[Navid Shafa]

If you're just messing around with Inventor pre-season, I suggest you download Inventor 2012, to get ready for the next season. You can get a free version at autodesk.com/firstbase

If you're stuck with 2010, because you fear the UI changes, fear not you can customize it to look how you want. I really recommend the upgrade.

I find that screwing around in Inventor is a great way to get prepped for an upcoming season, try a few simple projects too if you have some time to kill, it's good practice and is certainly fun. Good luck!