Selection by clicking on an object selects that object. If the click is on a stack of objects, a click on the front object will always select that object, and a click on an object behind the front object will select that object.
That click must be on the second object, meaning it must be on a part of that object that is not obscured by the front object.
Objects can also be selected by creating a 'selection rectangle.'
Selection rectangles select each object they 'touch', including front objects and objects located behind front objects.
This opens another route to selecting only the object behind a Front object.
Place the pointer in an unoccupied position in the document, close to the object you want to select, and to the object in front of it.
Press the mouse button, or touch pad to activate the pointer, and drag toward the objects. As you drag the pointer, a selection rectangle will be drawn. When that rectangle touches an object, that object will be selected (or added to the selection if one or more objects is already selected), and small 'handles' will appear at the corners of the selected object(s).
When the object you want is selected, release the mouse button, then use command-click to de-select the objects you do not want to be selected. When you have deselected all but the one object you want selected, you can move that object to the front, using the Arrange menu, or move it up, down or sideways on the page using the arrow keys (press and hold the Shift key, and tap an arrow key for motion with bigger 'steps')
When you have finished with your edits to the object, drag it back to the position, and use the Arrange menu to move it 'back' to its original layer in the stack.
Regards,
Barry
