Tick the End Cap box to activate the menu.

NB Changes to the line end cap only become visible when a line thickness greater than Thin is selected.

There are four End Cap options - butt, round, square and triangle. Butt draws the end of the line square - the other options add a cap to it, increasing the line length. The width and height of the triangle can be set using the dropdown menu and writeable icon.

Click OK to apply the style, or select another option from the Style dialog box.