The Dallas Morning News is joining the trend for newspapers including the New York Times to tweak their digital paywalls "to try to capture a larger readership," writes Justin Ellis. "Publisher Jim Moroney says the company is exploring its options — including adding a meter that would allow for a limited number of free stories, creating specialized tiers of digital access to Dallasnews.com, or creating time-limited access to the site, like a 24-hour pass."