GUI toolbar button labels can easily be set and customized using underlying Java components.
HTML can be used to add image icons to Matlab listbox and popup (drop-down) controls.
Matlab Desktop shortcuts can be programmatically accessed and customized.
Matlab uipanel controls can be customized using Java in ways that are impossible with plain Matlab.
Matlab listboxes can be customized using custom Java cell-renderers.
An animated spinning icon label can easily be embedded in Matlab GUI.
Matlab listboxes and editboxes can be used to display rich-contents HTML-formatted strings, which is ideal for log panels.
Images can be added to Matlab controls and labels in a variety of manners, documented and undocumented.
Matlab menu items can easily display custom icons, using just a tiny bit of Java magic powder.
Matlab's semi-documented tab panels can be customized using some undocumented hacks