Previously you made a Group of objects. But now you cannot find the Group Object Icon so that you can select or edit the objects in the Group.
Here's how to locate the Group:
1. Click on the All button and the Select button to see the Object Icons for Groups (and Object Icons for all other objects).
2. If you are using Lumion 10 or newer, simply click on one of the objects that belong to the Group in order to select the Group. Doing so will highlight the Object Icon for that Group in blue:
3. If you still cannot see it (or if you are using Lumion 9 or older), you may need to zoom out and around from the objects where you think the Group Icon is, and locate it at some other place.
Sometimes the Group Icon can be far away from where the main set of objects are placed. That is because the Group can include an object far away from the others. Or the Object Icon itself has been moved to some other location.