In many cases, Simulink® users have multiple blocks that they wish to connect to a block, particularly mux, demux, and bus creator blocks. The current practice is to drag one of these blocks from the Simulink library browser into the model. The mux block, for example, by default has 2 input ports. If you have 4 blocks that you wish to connect, you must open the mask of the mux block and set the number of inputs to 4. This will then create 4 input ports on the mux block. The user can then select the 4 blocks he/she wishes to connect to the mux block, hold CTRL, and select the mux block to automatically connect all of the blocks.
This function eliminates the manual step of opening the mask and setting the number of desired inports/outports and does that automatically based on the number of blocks the user selected to try to connect.
Open the included Simulink model AutoSizeOnConnect.mdl and follow the instructions therein to see an example of how to use this function.
This functional is especially useful when used in conjunction with AutoSize, which is included in this submission but can also be downloaded separately (see Acknowledgements below).