Opening the Underline Options in InDesign means showing the Character palette/panel and selecting Underline Options from that panel’s flyout menu. It’s not very convenient or expediant. Wouldn’t it be nice if there was an easy to remember keyboard shortcut for opening the Underline Options?
Well, there is.
The character mode of the Control panel in InDesign CS2 and CS3, which appears any time the Type tool is selected, contains the Underline button. Clicking the button underlines text with the default options. Sometimes the default options are what you want, but usually they aren’t; usually you’ll want to tweak the appearance of the underline or its distance from the text in the Underline Options dialog box. The fastest way to get to Underline Options is to hold OPT/ALT while clicking on the Control panel’s Underline button.