User blog comment:Rupert Giles/Layout Changes: Breakpoints and Typography/@comment-6301921-20150529205257/@comment-2126441-20150530074751

I'm going to agree with everyone here stating those are some horrible tables, with content that probably should not be in a table to start with, but probably would fare much better tiered like this:


 * X
 * X1
 * X2
 * Y
 * Y1
 * Y11
 * Y12
 * Y2
 * Etc.