I have a dashlet report that has a good number of columns. Right now I can only place it in either the left or right dashboard column. That cuts of the report view and I have to expand it every time I want to see the entire thing. Is there a way to make it wider on the dashboard or perhaps have it span over the right and left column?
You can make the dashlets wider on the dashboard.
It's hard to give exact instructions because I don't know what CMS you're using - it's a good idea to post your CMS and CiviCRM version with a question for this reason - but if you're using Drupal 7, I like the Civi Bartik theme for my back end. It makes a number of sections wider, including the dashlets. Make sure that
civicrm_theme is enabled, then go to the "Appearance" section of Drupal and set the CiviCRM back-end theme to Civi Bartik.