Normally, internal input and output connector tabs on compound blocks are equally-spaced along the right and left side of the window. You can, however, stack them to conserve space and make it easier to display the connector tabs on screens of different sizes and resolutions. In this mode, connector tabs are grouped together and displayed from top down, as shown below:
To stack internal compound block connector tabs
1. Choose Edit > Preferences and click the Preferences tab.
2. Activate Stack Internal Compound Connectors.
3. Click OK, or press ENTER.