Themes

Activating the plugin edits two of MyBB’s templates in every theme:

• postbit and postbit_classic get {$post['reactions']} at the foot of the post, straight after whichever of {$post['iplogged']} and {$post['input_editreason']} comes last - under the message and the IP address, outside the part quick edit replaces. The stylesheet lines it up on the right.
• usercp_options_pms gets {$reactions_usercp_option} at the end.

Deactivating takes both out again. If you add a theme after activating, deactivate and activate the plugin to edit that theme too. A theme with neither {$post['iplogged']} nor {$post['input_editreason']} in its postbit won’t get the bar; add {$post['reactions']} wherever you want it.

Restyling

The plugin’s look is in the reactions.css stylesheet, attached to the master theme so every theme inherits it. To change it for one theme, edit that theme’s copy under Templates & Style, then Themes. Colours use Bootstrap’s --bs-body-bg and --bs-primary where a theme defines them.

The plugin’s templates are in the Reactions group under Templates & Style, then Templates.