How to cancel the shadow of the blocks in .mdl files? (Matlab 2013a)

In Matlab 2013a, when I running a simulation in .mdl files, the system default view pattern offers each block has shadowed appearance, I don't know how to cancel it. I mean that I do not set the block shadow pattern on in Format tab on purpose, every block has this shadowed effect when it was used in Simulink .mdl files.

Answer 1

[Mischa Kim]

Mike, select File > Simulink Preferences > Editor Defaults > Use classic diagram theme (in the Simulink model window).