Message Display (msgDisplay.js) is a script that can be used by other scripts to display messages to the MediaWiki user. Each of these tools should have its own documentation. This documentation is only for the display itself.
You can resize the display to make it display more than a single line at a time in two ways:
You can set the size of the display by editing your common.js file. See Customizing below.
While the display has the keyboard focus, you can type several characters-commands: with ^ or Shift+Esc you can remove the display, ! acts like double click (described above), and ` (grave accent) collapses the display if it is temporarily expanded.
Internet Explorer - There are several problems that I noticed with (version 10 of) this browser:
Comming soon...