It's very simple to add border to OrkuGifs graphics. First of all, find the image you want to add the border and then click on this button below the graphic: Done! Now just choose the styles and colors of borders you like.
Check some examples:
Adding borders to external images
It's also possible to add borders to external images (hosted on other servers). To do this, click here:
Then choose the colors and styles of border and enter the address of the external image of the appropriate field.