MyObjects allow you to make a lasso around several objects and then save them as a favorite selection.
Make a lassor around objects, then click on "Save as my objects" button.
Select a name for the group. A thumbnail will be created and you can drag the group out into the layout.
To ungroup, click on one of the objects in the group and then click on the UNGROUP button in the top toolbar. This will make the objects free to move around individually.