Select Edit mask from the Edit menu of the model window or from the block's context menu. (Right-click the subsystem block to display its context menu.)
The Mask Editor appears.
See The Mask Editor for a detailed description of the Mask Editor.
Use the Mask Editor's tabbed panes to perform any of the following tasks.
Create a custom icon for the masked subsytem (see The Icon Pane)
Create parameters that allow a user to set subsystem options (see The Mask Editor)
Initialize the masked subsystem's parameters
Create online user documentation for the subsystem
Click Apply to apply the mask to the subsystem or OK to apply the mask and dismiss the Mask Editor.
