What Are Masks?
A mask is a custom user interface for a Simulink block.
The mask hides the native user interface of the underlying block,
substituting an icon and a parameters dialog box defined by the mask.
You can apply a mask to any Subsystem block, Model block, or S-Function
block. The block can optionally reside in a user-defined library.
Masking a block changes only the block's user interface, not
its underlying characteristics. For example, masking a nonatomic subsystem
does not make it act as an atomic subsystem, and masking a virtual
block does not convert it to a nonvirtual block. You cannot save a
mask separately from the block that it masks, or create a freestanding
mask definition and apply it to more than one block.
A mask's icon and parameters dialog box can provide any capability
that a block's native icon and dialog box can provide. When you set
mask parameter values, the mask can use the values to dynamically
change the mask's icon and dialog box, and to calculate values to
be used under the mask. A mask on a subsystem can dynamically change
the subsystem to reflect mask parameter values.
 | Working with Block Masks | | Why Use a Mask? |  |
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