Starting from v8 versions Rasters are no longer treated as References but as graphics elements. This causes lot of issues while working with rasters as they can be accidentally moved, resized etc. Also when any manipulation command is acrive which doesn't support Raster attachements is active the Raster Manager becomes unresponsive without any messages. This is confusing for users. At the same time delete command is exception and Raster Manager works while delete command it is active. We need a switch to simply lock rasters without lot of steps to do that.https://communities.bentley.com/communities/other_communities/askinga/w/askinga/679/stop-accidentally-deleting-your-rastershttps://communities.bentley.com/products/3d_imaging_and_point_cloud_software/w/wiki/25511/way-to-disable-raster-when-working-with-microstation-tools