My images are converted to DNG format on import. I then edit in Lightroom 5. However, after editing and viewing at full screen I sometimes like to go back to some of the images and change things slightly. I have tried to use the adjustment brush for dodging parts of an image, but when I try absolutely nothing happens - there is no response to the slider. I have noticed though, that the little header showing the effect that has been selected, and in my case -' Dodge (lighten)' - has the word 'edited' in brackets appearing after it as soon as I move the slider. This seems to prevent me doing any dodging at all. What is happening here? Any ideas please?