Aww bless, just Shana is fine 
Go to Manage, Files and scroll down and choose the post template file. There you’ll see
| Code: |
{content} |
replace that with
| Code: |
{the_content more_link_text="TEXT YOU WANT TO USE"} |
Then when posting, if you’re using the plain text editor there’s a ‘more’ link, or you can add it manually, where you want the break as:
| Code: |
<!--more--> |
I’m sure there’s a corresponding button on the WYSIWYG.
