Yes you can do this, but you’ll need to adjust this from your style.css file. You would need to figure out what size you want the 3 sections to be, and then make the adjustments.
The first div/section is called – “.home-feature-sidebar”
Then the “home-feature-1” and “home-feature-2” are inside of a div titled – “home-feature-section” so you’ll need to adjust that as well…..or you can remove it from the home.php file….either way it will work.
All of this is located in your style.css file around line 682 –
/* Home Feature Section
------------------------------------------------------------ */