Hi @crossyatom46,
Thanks for contacting us, I have checked your website and I couldn’t find an AMP version, but if you would like to customize the Reader Theme here you will find more information: https://amp-wp.org/documentation/getting-started/reader-mode-themes/.
@crossyatom46
Thanks for getting back to us, at reader mode you can choose some compatible themes, and they will behave differently with resume or full post:

And you can use the “customize panel” to change some settings:

If you want to change programmatically, you could create a child theme and activate as a reader theme:
https://amp-wp.org/documentation/playbooks/adding-reader-themes/
In case you want to do some changes in a Legacy theme, you can check this section:
https://amp-wp.org/documentation/playbooks/classic-templates/
If you have any question please let me know.
@crossyatom46 As we haven’t received a response, I’ll mark this as resolved. Feel free to open a new support topic if you continue to encounter issues, or reopen this topic and we’d be happy to assist. Thank you!