Selecting [Copy movements] from the main menu [options] menu will show the change movements dialog. The [Copy movements] dialog is very similar to the [Open] movement. The main difference in the display is the ability to choose more than one movement. Only movements next to each other in the list can be in a multiple choice list.
One way to limit your choice of movements for copying is to change the selection rules. For example you might choose "Mitchells" and then click [select all] button. Another way to choose a selection is to the click the first movement for your list and hold the [shift] key down and click the last required. All intervening movement will be highlighted and in the chosen list and will be copied once the [copy] button is clicked. Using the shift key in conjunction with the down and up arrow keys will achieve a similar result.