outlook screen

The inbox screen has a blank column on the right side where the facebook, etc message request used to be.  I don't want that particular column back as I don't do social media.  But I do want the emails screen to extend to the right margin.  I've tried and tried but the email messages column won't move all the way to the right margin.  I either get some "tips, ads, or blank column.  How do I correct this.  I just want the Hotmail email screen.