New Version!

Ever wish you could show or hide the name of the block without having to navigate to right-click->Format->Show Block Name?
This adds a custom menu item in the right-click Menu to toggle the state of the 'ShowName' and 'HideAutomaticName' properties of one or more selected blocks in your model.
More important, this assigns this function to the keyboard shortcut Ctrl+Shift+F. So now you just highlight the blocks and hit Ctrl+Shift+F to toggle the Show Block Name option!

The latest version fixes a few issues:

1. Auto show/hide name
In R2017b, the option to show a block's name had a 3rd option added: "Auto." This option automatically hides blocks with default block names (e.g. Gain1, In1, etc). The implementation of this created a new block property, HideAutomaticName, which needs to be considered in this shortcut. This function has been updated to toggle through the 3 options in this order:
- Auto
- On
- Off
Note: If you select multiple blocks, it will toggle each of them independently. For example, if block1 is currently Auto, and block2 is currently On, after toggling with the shortcut key block1 will be On and block2 will be Off.

2. Shortcut Key
Per the R2020a documentation, Ctrl+Shift+S has been assigned to a built-in function, save active referenced model (https://www.mathworks.com/help/simulink/ug/summary-of-mouse-and-keyboard-actions.html#butubxj). It's rarely a good idea to try to override built-in shortcuts, so the safer approach is to alter the shortcut key for this function. I have changed the shortcut to: Ctrl+Shift+F. Why did I choose this? Because I want to easily be able to trigger this shortcut with my left hand only, keeping my right hand on the mouse. If you prefer a different shortcut key, simply edit line 46 of the sl_customization file. Just be careful and be sure to check for conflicting assignments in Preferences->Keyboard->Shortcuts