Just right click the top of a block. If you mean how do you stack them in your inventory, it should be automatic. Unless its a door, a tool, ETC
Chat with our AI personalities
4 clay blocks i think
right click the stack and add it will give you half if you want to split it more then right click it more the once.
You take the whole stack, and right click the stack onto a free inventory, crafting, furnace or chest slot. This will remove one item from the stack, and can be repeated if more items are to be seperated.
To select one item from your Minecraft inventory, left click on the stack of blocks you want and right click on an empty grid slot to seperate one from the rest. Then left click in another empty slot to place the rest of the stack back down.
Minecraft characters are approximately 2 blocks high.