It's very important to understand the layout and the best way to learn them is by practicing, and here is a project showing how to design a dashboard in uniGUI using layouts, I have searched the internet for a dashboard and found this one and this project for you.
I hope this will help you understand layouts.
Plus: responsive content ! + UniCharts (Pie & line) - try to resize your browser, and try to refresh page to see random results for the charts.
Online demo here: http://18.104.22.168:xxxx
Download project (with .exe) http://3msoft.net/mhmd/layout.rar