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AmigoMac said:
Pretty interesting for a lot of new users, this may appear as well if you have activated the debug menu, there is the shortcuts list... I know a lot of people don't know/bother with the debug menu...
I found this in the debg menu. I learned about some keyboard shortcts that Safari has that I didn't know about by looking a that file. The debug menu has some other interesting items too, such as a view of the current document's DOM (document object model) tree.
 
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