The UGX Laucher supports a built in Logger & Debugger to display debug messages, activate functions, and show windows on demand.
Included also is a Designer Mode which enables certain helpful functionality for Designers (see Community Contributions)
Logger (with Debugger) window
It also supports a Designer Window to help visualize and style all controls quickly.
How to enable Logger / Debugger / Designer Mode
Review the Launch Parameters to enable the Debug Mode.