[img_scale/] resizes an input image proportionally to some percent of it’s original dimensions. The value should be a positive integer; percent="100" is fullsize; percent="50" is halfsize; etc.

[img_scale output="{format}" percent="{int}"]<source>[/img_scale]

percent

[img_scale output="img" percent="50"]atest.gif[/img_scale]

[img_scale output="img" percent="200"]atest.gif[/img_scale]