Michael Carone, MathWorks
As you build your model, you can double-click the end of new signal lines to search for and select a block from a menu to connect to the signal. The menu suggests blocks to insert based on context. For example, if you draw a signal from a Gain block and double-click the new signal line, the menu includes math blocks such as Sum. You can select a listed block to insert or start typing to search for and insert any block.