Wider width to pages

Hi. I would like to expand the width of the contents in the pages. I mean, the blocks are not using all the width of the white box and I'd like to expand it. I put an image at https://www.dropbox.com/s/cvxtxkhx5ee7dzx/bigger_width.png?dl=0 In this image I'm using 2 columns. I didn't type in the second column, yet. But I would like to make the detached image and the columns box wider. I think it's a simple code, but I couldn't find what I should do. Best regards from brazil, and please be safe. Stay at home as much as you can. AleMello