Ctrl+U should be underscore, not Preferences panel
In just about every Windows app I work with, Ctrl+U invokes an underscore on highlighted text. Not so in DW. Instead it opens the Preferences panel.
The <u> element was deprecated in HTML 4.01. But the W3C redefined it in HTML5 to represent text that should be stylistically different from normal text, such as misspelled words or proper nouns in Chinese.
Ctrl+B = Bold or <strong>
Ctrl+I = Italic or <em>
There is no Underscore option on the HTML Properties panel.

Logically, Ctrl+U should be Underscore or <u>.
Nancy

