The default controls require you to right click with the selected item in your hotbar, make sure to be looking at a surface that is highlighted with a black square to show you are ready to place something there.
Simply right click. If you put it in the wrong place, left click to destroy it.
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Placing items in Minecraft is usually done with the right mouse button.
to rename items
go into the minecraft source file(windows=Run-%Appdata%-->.minecraft/mac=finder-->Username--> Library--> application support-->minecraft) then go to saves then your world and copy the level.dat file to the desktop. go to minecraft then put all items into your chest. save and exit, then quit minecraft.replace the new level.dat with the one on the desktop and there you go, duplicated items!
Not including potions, there are 300 items and blocks if it isn't modded.
It holds items like a chest