I am creating a mask of the sky behind a church with numerous crosses that extend into the sky. I used the wand tool to make the sky black in the mask. When I then added in the new sky, there was a white outline around each cross. To remove these white lines I want to perform the following: Select, Modify, Expand (to 2 pixels). But CS6 will not allow me to use the drop-down menu to click on these three commands. Instead, when I click on Select, the Modify choice in the drop-down is greyed out and cannot be selected.
Thus, my question is how do I get to the Expand choice in the Select, Modify, Expand drop-down box?
Please let me know if you need additional information.