In addition to what others have said,
‘CopyToClipBoard’ the objects in the first file then ‘Paste’ the objects into the second file and if these objects happen to be off the screen, as they are still selected directly after the paste command, use ‘zoom selected’ to take you to there.
Then ‘move’ the still selected objects by picking a convenient point to move from, then ‘zoom previous’ to take you back to the working area and pick a second convenient point to move to.