Like putting a texture in the left slot of the "Visual" page for a block fills all other 5 slots, putting an item /tag in the center of the crafting table when creating a recipe element should fill all 8 other slots with it except the output slot, saving you time when making a recipe that uses 9 of 1 item like a compressed block, or to just remove 3 or so for a custom stairs, furnace, chest or whatever.
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.