question about changing to absolute or relative path

Dear all:

I have a question to ask you guys about changing file path when moving file into modx.

I am following this tutorial to set up my first modx website:

http://codingpad.maryspad.com/2011/01/23/modx-revolution-for-complete-beginners-part-4-working-with-templates/

in step 3, they explain that I need to type a absolute path for the file. can I use relative here?

thanks

ernest