You can do this very simply, here are the steps;
-Look at this tab, it’s the one above where you type— it has the different tools to use bold, italics etc. You know the one, refer to this screenshot if you don’t,
-Select this icon, it’s the one with the different lines of various lengths. Refer to this screenshot if you’re confused,
-Choose ‘align centre’,
-Start typing whatever you want, it will be in the middle.
That should do it!
If you have any further questions or concerns please do not hesitate to message me or another staff member.