Bold color text in the Command Window
Matlab Command Window text can be formatted *bold* since R2011b.
HTML
Multi-line uitable column headers
Matlab uitables can present long column headers in multiple lines, for improved readability.
Customizing menu items part 1
Matlab menus can be customized in a variety of undocumented manners - first article of a series.
Multi-line tooltips
Multi-line tooltips are very easy to set up, once you know your way around a few undocumented hiccups.
Uitable cell colors
A few Java-based customizations can transform a plain-looking data table into a lively colored one.
Uitable customization report
Matlab's uitable can be customized in many different ways. A detailed report explains how.
Uitable sorting
Matlab's uitables can be sortable using simple undocumented features
Uitab colors, icons and images
Matlab's semi-documented tab panels can be customized using some undocumented hacks
Customizing uitree nodes – part 1
This article describes how to customize specific nodes of Matlab GUI tree controls created using the undocumented uitree function
Syntax highlighted labels & panels
Syntax-highlighted labels and edit-boxes can easily be displayed in Matlab GUI - this article explains how.