tinymce question ‘Read more… ‘

This is pretty random, so I assume this is the best catagory to post under.

When using the tinymce editor, my users are using the “Split Post with More” feature. What is annoying is when they use this feature this is what displays on the website:

Read more… or Read more right here… ?

All I want is the Read more right here, I don’t want to be able to open it up in a different page.
I’ve searched through many of the tinymce files and I still haven’t found what generates this code.

Any help??