I Think That When You Add Mobs To A Biome, You Should Be Able To Select Multiple At A Time Instead Of Having To Go Back To Select Another One.
MCreator issue tracker has been migrated to GitHub.
Existing tickets have been migrated to GitHub. Please open new tickets on the GitHub tracker instead. If you do not have a GitHub account, all feature requests and bug reports from forums are still considered and checked by the maintainers.