here's a pic of my layout which i find easier to use after you adjust to it. this also helps keep communication in battle by splitting the 2 chat boxes.
here's how you go about setting up the two if you didn't already know.
1. configuration > chat log
2. enable the 2nd one
3. adjust the 2nd one to be your new battle box, or adjust to how you want it mine is the battle message box.
4. remove the tab from the first box your primary communication box.
5. adjust filters to your own needs, i try to keep my communication box low so that way i can still get messages in combat.
other widget placement find spots that fit for you that won't be bothersome to how you play. this is so that way we can still communicate in battle which is important seeing as we should be learning how to battle regimen (new skillchain). also i have certain message appear in both so i can't claim i don't see em.