step file-import,export,and save parts separately,use of isolate command,work easily in solid work

In this video we discuss on following point in solid work :-
1) how to import and export step file .
2) how to save step file into solidwork file(part file or in assembly file
3) how to work on step file assembly and work on all part separately without any disturbance to another part of assembly
4) how to save step file all part separately
5) how to work with isolate command
solid work