To clear an area grab wooden axe.
right click one corner
left click other corner
//set [block type] zero for clear or block type to set it to that block.
To make elevator
create a shaft with some kind of block, anything but iron blocks
make lowest elevation solid iron blocks for floor
at each floor level 3 blocks up put a sign on wall opposite of door that is blank
put a button just below sign at 2 blocks above floor level.
To make portal.
create portal locations with /wpdc portal_name
make portal frame from anything and put gold blocks inside
at first portal location in front of port issue command to turn gold blocks into water portal
/wppc first_portal_name second_portal_name water and click gold block with fishing pole
Then go through portal to 2nd portal location and turn and issue command again to go back to first
/wppc second_portal_name first_portal_name water and click gold again.
To make a buy sign
in sign test use
[Buy] for buy and [Sell] for sell
Item_Name i.e. Bread
$10 dollar amount