when i finish a part of a mission a dialogue pops up asking if i want to continue (warp out, beam down, etc.). if i choose to put this off to explore for anamolies, how do i bring up the dialogue again (when the OPS button in the lower right is not there)??
The OPS button should be there if you still need to beam down (at least it has when I needed it).
If your options are to beam up to the ship or to warp out, there's a button to the upper left of the minimap. The icon will change from an up/down "beam arrow" to a galaxy shaped "warp out button" depending on whether you're on the ground or in space. Hit that and a box saying something like "your mission is complete, do you wish to [whatever]" should pop up.