An 'object' is anything on the edit-bar that has a distinct position of its own. Ornaments and the like are directly connected to a note and have no distinct position of their own.
To alter the position of an object use the buttons or more convenient <alt->, <alt-> <alt-> <alt-> while the cursor is pointing at the text to move the text-object in any direction
An object may be moved to the left and right (and exchange neighboring position) using or <ctrl-alt-> and <ctrl-alt->.
Objects that have a parameter (like text-size) can be altered (resized) using or <ctrl-+> or <ctrl-->
Use the context menu of an object for more information depending on the objects properties.