Persisting transparent colors in HG2
We can set semi- and fully-transparent colors in HG2 for multiple graphic objects, but making these settings stick is non-trivial.
Undocumented feature
Undocumented HG2 graphics events
Matlab's new HG2 graphics engine includes many new undocumented events that could be used in various ways.
General-use object copy
Matlab's dual internal serialization/deserialization functions can be used to create duplicates of any object.
Auto-completion widget
Matlab includes a variety of undocumented internal controls that can be used for an auto-completion component.
Undocumented view transformation matrix
Matlab's view function returns an undocumented output transformation matrix.
Plot legend title
Titles to plot legends are easy to achieve in HG1 (R2014a or earlier), but much more difficult in HG2 (R2014b or newer).
Using Infiniband with Matlab Parallel Computing Toolbox
Infiniband networking can significantly improve PCT performance in Matlab parallelization and distributed computing.
Frameless (undecorated) figure windows
Matlab figure windows can be made undecorated (borderless, title-less).
Transparent legend
Matlab chart legends are opaque be default but can be made semi- or fully transparent.
Simulink Data Dictionary
Simulink contains undocumented public API for access to its data dictionary functionality.