To open the Simulink Start Page, in the MATLAB Toolstrip, click Simulink.
On the Start Page, click the title of a template to expand the description.
Click the down arrow next to Create Model and select Set As Default.
Simulink® is a block diagram environment for multidomain simulation and Model-Based Design.
It supports system-level design, simulation, automatic code generation, and continuous test and verification of embedded systems.
The blocks and lines in a block diagram collectively describe the overall model of a system.
Simulink extends classic block diagrams by: Adding a set of equations (block methods) to each block that defines the time-based relationships between the input signals, output signals, and block state variables.