Photoshop cs6 help

[kathy65]

Not sure where to ask this question so I will post here.


I need to change the color of my photos backgrounds to black. I have watched a ton of videos on how to do it but I cant figure it out. When I use the tool and outline my image I go to redefine edge. I select background color to black and it actually changes the actual image to black not the background. I have been working on it for 3 hours. I am brand new to photoshop (I use lightroom 6 all the time) so please if you can help me out put it in simple step by step directions.

 

[tirediron]

Once you've got the edge where you want it, go to the 'Selection' menu and select 'Invert Selection'. THEN apply your colour fill.

 

[kathy65]

Thanks Tried that but I cant get the color to stay. I go to redefine edge, click background, and then ok. It stays black for a minute but then it goes back to the original.
Also, what tool do you use to fix the edging?

 

[The_Traveler]

When you say the background, do you mean the part that projects beyond the image?