This article covers the default preset, Grid - Image - Standard.
CSS Grid may not be fully supported in IE. I have not tested this solution in IE or Edge. See the support here.
The out of the box break points for Easy Posts are 1120px and 768px where the posts get 50% and 100% width respectively. With the solution in this tutorial, it is going to be 1119px and 759px. These will of course dynamically change depending on the (horizontal) grid-gap and padding values we are going to set for .oxy-posts.