Frameless (undecorated) figure windows
Matlab figure windows can be made undecorated (borderless, title-less).
Presumed future risk
Transparent legend
Matlab chart legends are opaque be default but can be made semi- or fully transparent.
Customizing Matlab uipanels
Matlab uipanel controls can be customized using Java in ways that are impossible with plain Matlab.
Simulink Data Dictionary
Simulink contains undocumented public API for access to its data dictionary functionality.
Accessing hidden HG2 plot functionality
In HG2, some of the plot functionality is hidden in undocumented properties.
Matlab compiler bug and workaround
Both the Matlab compiler and the publish function have errors when parsing block-comments in Matlab m-code.
export_fig
The export_fig utility enables publication-quality Matlab plotting output.
Unorthodox checkbox usage
There are various ways to display interactive split-panes in Matlab GUI. Uiextras flex-panels override a checkbox control's CData to display a divider.
New book: Accelerating MATLAB Performance
Accelerating MATLAB Performance (ISBN 9781482211290) is a book dedicated to improving Matlab performance (speed).
Transparency in uicontrols
Matlab uicontrols' CData property can be customized to provide background transparency.