The "/ui" command

Will open any UI onto the target’s screen. Will mostly be for Adventure maps if the creator doesn’t want a crafting table or furnace around two mess up the style of the room or if the crafting tables and furnaces are part of the room' style and the creator doesn't want them crafting or cooking/smelting anything.

Examples:

/ui <target> “This is the default it will open the target’s inventory. (If <target> is left blank/empty, it will open the closest player’s inventory)"

/ui <target> close “Will close/exit any UI the target is in/using”

/ui <target> <lock|unlock> <blocktype> “Will prevent the target from opening the selected UI.

/ui <target> <chest.near|shulkerbox.near|barrel.near> “Will open closest specified storage UI to the target. (Can open locked chests and shulkerboxes)”

/ui <target> <inventory|enderchest> “Will open the target’s inventory or enderchest.”

/ui <target> open:<blocktype> <placeblock:Boolean> “Will open the UI of pretty much all of the villager proficiency blocks ie crafting table, brewing stand, cartography table, furnace and types, grindstone, etc. (Items left inside these forced-open UI’s will be deleted.)(They do not have to be near any of these blocks at all) If the placeblock Boolean is true, the chosen proficiency will be placed at the target's feet."

<target> Is how it usually is.

<blocktype> Is the type of proficiency block UI that you want to open.

<placeblock:Boolean> Is if you want the block to be placed or not, true/false.