Selecting players and movement lines.
When none of the movement buttons is selected, you can select a player or a line by clicking it in the field window.
To select multiple players and lines, lines hold down the CTRL button while clicking on the players/lines.
You can also select an area of the field by holding down the shift key and using the main mouse button to resize a selection rectangle.
Finally all players/lines can be selected by choosing Edit - Select All or by pressing CTRL-A.
A selected player or line will have big dots, showing it has been selected.
Players or lines that are selected can be deleted by pressing the Delete button on the Edit drawing tab.
Selected players or lines can be unselected by clicking them again with the left mouse button.