Help with Easysocial theme container full width

Goodday, i am having little concern with making my easysocial theme dashboard container to be full width. i already asked this from my template developer and they said i need to make some changes to the theme i am using with Easysocial, that the theme determines the width and height of the webpage. Please how can you help me with this? i need it to be full width or almost. widthout loosing the module width, just the "stream content containter" kindly check my attachment for more understanding of what i need