Saturation question

I have a beautiful landscape picture taken in Lake Tahoe and I want to add some saturation to the sky and mountains (they look very dull). I went into hue/saturation and selected the blue for my sky. Saturated it to my liking and then used the history brush to undo the rest of the photo I do not want saturated in blue. My question is, the area where the mountains meet the sky I used the history brush a bit too much to where the saturated sky was undone in parts....how do I correct this?

The best way to do this is to use Layer masks and not the history brush. When you make a mistake with the history brush I don't believe there is a way to fix it without "undoing" the history brush step. With a layer mask you can "undo/redo" simply by painting white or black on the mask.

There are some excellent and detailed articles here:

http://www.ronbigelow.​com/articles/articles.​htm

Or some here:

https://photography-on-the.net ….php?p=263570&p​ostcount=2