How to set image margin with text?

Here is my post with a magnifier:
http://widyagama.ac.id/informatika/2012/09/pelatihan-linux-dan-temu-akrab-dengan-k-o-l-a-m/
This is working properly, but I want my image to have margin with text like any other images here:
http://widyagama.ac.id/informatika/

Is there any way set custom margin with this plugin?

http://wordpress.org/extend/plugins/nextend-image-magnifier/