How to Add a Page Number Widget in Blogger?

I have added a numbered page navigation widget to the main page of my blog:

I learned how to do this from here:

http://helplogger.blogspot.dk/2014/04/how-to-add-numbered-page-navigation-widget-for-blogger.html

Just for my record, I have set my max. number of pages to be shown on the main page to 19, instead of 7. If I wish to change this, I would have to search for the following in the template:

expr:href='data:label.url + "?&max-results=19"'

instead of:

expr:href='data:label.url + "?&max-results=7"'

 to make the change.