Hi Dodgy, you can set up a keyboard shortcut to do that.

Go to Options > Shortcut keys and push Add.

After setting the key you want to use, put this in for the Command part:

script: /* Toggle snap to locked objects */ moi.drawingAids.snapToLockedObjects = !moi.drawingAids.snapToLockedObjects;

Then you should be able to push that key to toggle it without needing to go into the Options dialog.

- Michael