Feature Request: Document Readability Enhancements

Reading books in an application is a wonderful feature, especially when combined with the ability to interact with the text. To improve readability, I would like to suggest adding a few features, such as: * Adjustable margins and line spacing: Giving users control over the layout. * Optimized text layout: Allowing the text to fully occupy the page, reducing the large empty margins currently present at the top and bottom.