Hi, I have same problems regarding Revis…

I have same problems regarding Revision please help me if is possible:
1-Where and how can I identify the Revision in a drwg, asm and prt, files in SW?… or (where and how can I find the Internal Property which give me the Revision number for a drw, asm ,prt files in SW).I know in drwg file I can observe in the right of the Title Block but I would like to know if this Revision I can find in other way with same property?
2-How can I modify the Revision for a files drw, asm, prt without using PDM or SolidWorks Explorer, other method?
Thank you I appreciate.