Hi Everyone, I am having some difficulties using the Region of Interest (ROI) tool in ENVI. I am using a time series collection of landsat data squares each covering the same area within the Peruvian Amazon. Im looking at NDVI variations of a spectrally homogeneous area of the region. I want to create an ROI that can be re-opened for every separate image to compare the NDVI variations over time. However whenever i create a new ROI it only lets me open it on the data square it was created on and i cant transfer it to a separate square of a different date. Any help would be great thanks! James