If you're looking to do an elaborate a page builder with ProcessWire and don't want to pull your hair out, I highly recommended viewing this video: A couple notes: with the css grid specification, you can assign multiple blocks to the same grid-area but they will overlap each other.  I've "overcome" this by combining multiple blocks into a parent div and assigning that instead. pretty easy to do. i didn't demonstrate it, if your blocks have a grid structure within them (like built with flexbox), you can still assign that block to a grid-area.  so if your blocks themselves have a grid structure, that's ok.  for example, if your css grid layout is 6 columns, but you have a block that has a grid inside of it (built with like uikit's grid that's 5 columns), you can assign that block to the grid-area. with the css grid specification, the flow of the blocks does not have to match the flow of the grid-areas.  this is insanely powerful. Enjoy.