Try the Commands Troubleshooting and Help page if you get stuff with server errors.
Written Book Command Maker Tool
Generate a give command for the Minecraft written book item, and add your own written content. Set color and styles, with some support for links and commands. The page editor allows for a variety text colors and styles. By linking text you can add links and commands. Commands in links can be a little tricky, so not all commands may work.
Page flow, pagination
There are several limits with page spacing. Pages allow for 14 lines, each line allows about 23 characters. Words and characters will automatically wrap to the next line. Create new lines using the enter key. Extra lines will be cut off the bottom of a page and not visible in most cases.
Creating New Pages
Use the "Insert page break" button to add new pages. New pages will separate into page by a horizontal line. To remove page breaks use the backspace or delete key, in the space way you would remove text.Minecraft Versions Permalinks
If you find yourself using a particular version all the time, you can link directly. There is some crossover between versions, so there will be quirks.
Version History
added1.21.4 items and blocks
patch1.21.4 cache issues
added1.21.4 items and blocks
addedMore 1.21.2 tags, including equippable, death_protection
addedFood consumable for 1.21.2 with effects
addedDecorated Pots
addedUpdated food to consumable for 1.21.2, still has some issues with effects
addedUpdated attribute names for 1.21.2
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(72 More Updates)