OpenRoads Designer Help Drawing Workflow Attach Tab References, Raster Images, Point Clouds, and Reality MeshRaster Manager Tools Contrast/Brightness To Adjust the Contrast/Brightness Display of an Attached Raster File To Adjust the Contrast/Brightness Display of an Attached Raster File Select the Contrast/Brightness tool ( Drawing > Attach > Raster ). Select the raster file. Adjust the Contrast and Brightness settings as required. Note: You also can select the image file prior to selecting the Contrast/Brightness tool.