All that is left is to use the break command from the View Layout toolbar on the command manager.

So in the view it ends up looking like this after picking the correct configuration. I was able to control which parts it affected and if I wanted it to propagate back to parts.

SolidWorks looks more modern and focuses on user-friendly operation and is somehow limited to what it shows you, CATIA acutally is the opposite, making it more hard to use but is not limited in what you want to do. I created a configuration at the assembly level called cutaway and sketched a spline at the assembly level. Both programs follow a different philosophy which makes them have lots of differences. So how do you work around this you ask? Well I came up with this- in the assembly you can do a spline on a plane normal to the view you want to cut. The problem is that this a current limitation in an Isometric view. Some of the componentry in the detail if you will. He was looking to get inside and show off The customer was asking for a broken out section, (which BTW is an Awesome feature in Solidworks!) He had already cropped the view because it was a 95' long part and that did not look to good on the sheet. I had a question come up the other day with a cropped view.

Solidworks crop view