[Feature Request] (Book)mark line above/below
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 Is it too much to ask for a option to mark line above or below of already marked lines? 
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 I think it is going to be tough to sell that idea without providing a use-case that would show that it would have general appeal. At this point, I certainly don’t see the value in it, but my mind could be changed. :-D Regardless, something like this could be scripted if you are open to using the Pythonscript or Luascript plugins… 
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 What made me think about it was long registry files, where I wanted to delete differently named keys with similar values. 

