They can cause instability, introduce issues and may conflict with future updates. Apply at your own risk!
Custom Login Form Message
This logical theme system hack allows you to show a custom message on the login form, above the inputs and below the title.
Change the contents of the file to suit your desired message.
Custom WYSIWYG Editor Buttons
This hack provides an example of adding custom actions to the WYSIWYG page editor (TinyMCE). By default, this adds an additional “…” overflow menu to the end of the WYSWIYG toolbar, which contains a single new “Insert Cat” button that has a custom icon. »
IFrame Specific Tweaks
This hack will add custom styles & scripts, hiding many parts of the interface while adding additional light/dark mode control, intended to provide a cleaner view that’s suitable for use within iframes embedded on external pages. »
Page Export Contents List
This hack uses the visual theme system to customize the page export template file, used for both PDF and HTML exports, to add a simple linked “Contents” list to the top of the file, generated from the headers within the document. »
Render TeX/LaTeX Mathematics with MathJax
This hack will allow TeX/LaTeX mathematic markup to be rendered within a page on BookStack using MathJax. Inline math can be surrounded with $ and math blocks can be surrounded with $$ or \[. »