Thanks for your reply, let me see if I understood you correctly, if I create a paragraph style with numbered list with no indent, and then in my document I create a list such as:
line 1
line 2
...
then I highlight this list and click the numbered list icon under the menu, the list will be with the style I created or I have to go to the Style list and select the numbered style I just created? What I'm trying to do is remove the indentation of the numbered list icon so every time I click on it, it will apply numbered list without indent to my selected list. How can I do this?

Thanks for your comment/suggestion
Michael