Describe your problem
I’m creating a modpack for Fabric 1.21.1 and I’d like to increase the size of the book in index mode. Is it possible to define book_width and book_height in book.json? The default size isn’t terrible, but it fits very little text per page. From what I can tell, the default is 256x256, but 288x256 would already solve my issue.

System (please complete the following information):

Minecraft Version: 1.21.1 (Fabric)

Modpack Link and Version: (custom, not yet published)

Specific mods with compatibility issues: Related to book rendering (requesting extended support for book.json configuration)

This is currently not possible - I want to make this work, but due to how rendering works this is not trivial, likely it will instead be 2 size options.

What you can do for now is only to add more text per page, until the scale gets too low

This is currently not possible - I want to make this work, but due to how rendering works this is not trivial, likely it will instead be 2 size options.

What you can do for now is only to add more text per page, until the scale gets too low

That's sad to know, but sure, thx for the reply anyway.