Resizing columns and rows in Layout

I recently started using layout and I’m trying to figure out if there is a way to resize a single column or row in layout without resizing any of the other columns or rows. For example, I have a set table size and I would like to have columns and rows within that set table size to have different sizes. I have grid snap on, but whenever i grab a single column line or row line and move it, all the other rows and columns adjust slightly.

Here’s a fairly straight forward explanation.
Layout Tables