[Help] My dog barks at everything. How can I train this out of her ?

I've got a 2 year old lab/collie that barks at everything. We used to live out of town on a private property so it was understandable for her to be on-guard when she saw somebody. In hindsight this probably reinforced that she needs to bark when she sees somebody.We've recently moved into town and she barks at everything. Neighbor on their back deck, somebody walking by, etc. She'll even growl (not bark) when she hears people talking loudly. Our bedroom has two large windows that overlook the street - she'll often perch herself there on lookout and bark at passerbyers.I've been trying to reassure her it's ok and once she barks I'll calmly acknowledge and direct her to another room. I'm not sure if she'll eventually get used to the new surroundings or not - we've only been here 2 days now but I'm getting annoyed with her barking at everything.Any suggestions? via /r/dogs http://ift.tt/2ssTvJw