How to increase right column using the default Article Content Type

Hello, all:

I am still learning my way around Drupal 7 (Struggling) when trying to setup and layout content. I am working with the default Article content type with I believe the Display Suite where I have two column stacked configuration, and I have a wider than desired center margin or space that is squeezing the right column text to where it seems unnaturally thin output. The column seems to be set to a equal division. The image within the left column seems to have freedom to adjust in size, but the right column with text seem to be restricted from widening in size. Please direct me on how to widen the right text column.