As explained in the VMware Smart Assurance Service Assurance Manager Operator Guide, the -D option for the sm_gui command enables you to adjust specific Java properties that affect the Global Console. For example, you can control the display of text for toolbar buttons, maps, and the font that displays throughout the console. The -D option also enables you to override certain default Global Console behavior.
The VMware Smart Assurance Service Assurance Manager Operator Guide provides more information on the -D option for each property or value pair.