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You have to cloned the or use the template then once it is in your forms you can start editing the form.
Here's the form URL http://www.jotform.me/form/21153038367450. To clone this form please follow this guide on how to https://www.jotform.com/help/42-How-to-clone-an-existing-form-from-a-URL
Or you can just use the template from Form Templates.
Thanks for the reply, I've cloned the form and clicked to edit but its the matrix that I can't amend the detail on.
You have to click on the Matrix field, in the field properties, you should be able to change the options to the Rows and Columns: