draw a box of 100mmx100mm and select the plugin :
you will get the box in the picture :
and press apply
you can get the plugin at this URL: https://jtechphotonics.com/?page_id=2012
draw a box of 100mmx100mm and select the plugin :
you will get the box in the picture :
you can get the plugin at this URL: https://jtechphotonics.com/?page_id=2012