Somehow my graduate filters screwed up. Now when I try to use it the 3 lines show up, but when I try any slider the effect is only seen in the thumbnails, when i click out of the filter the effect is applied.Any help please
What is your version of Lightroom and OS?
window 7 Lightroom 6 cc
the graduate filter and the brush seem to only show up in thumbnail, the orginal image does not show the transition, but when you click out it applies it to the image.It was working fine 2 days ago.I cannot get it to show the transition in the main image, only the thumbnail
Try if it helps to deactivate the GPU acceleration: Adobe Lightroom GPU Troubleshooting and FAQ
If it did not help, try resetting the preferences: Resetting Preferences in Lightroom CC/6 | Lightroom Blog