Opus allows you to stack objects across or down the page. This will cause the objects to be positioned exactly alongside each other in whichever direction you have chosen. Opus provides a shortcut via the Stack option on the Arrange menu.
Hold down the Shift key and click on all of the objects you want to stack. A bounding box will surround each object.
Click on the Arrange menu and point to Stack, then click on the Across or Down option. The objects will be placed alongside each other in the direction you specified.