New to world edit? These are basic commands that will help you get started. Allowing you to do most everything you want.
(Use command instead of clicking for "Single Player commands" for proper selecting.)
//hpos1 =command for left click, 1st position instead of clicking.
//hpos2 =command for right click, 2nd position instead of clicking.

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//copy........................................... Copies sellection to clipboard. (it copies it)
//schematic save mce NAME......... Copy your selection first. "mce" is the format. Type a name for the schematic.
//schematic load NAME................. Load the schematic to clipboard. (loads it so you can paste it)
//paste.......................................... Pasting large schematics can take up to a min. So just wait for it.

//replace ID ID............................... from, too.
Replace a specific block in a selection with another block with out changing other blocks in the selection.
//set ID......................................... Change all blocks in the selection. (using "//set 0" will delete blocks to air.)
//rotate 90..................................... Rotate selection 90 degrees. Always rotates to the right. (takes practice)
//rotate 180................................... Rotate selection 180 degrees. (takes practice)
//undo........................................... Undo last command you did.

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NOTES: When you copy a selection for "/schematic save", It will paste it in the same place you copied it relative to your position, (see 1st photo). So choose your position carefully when doing a copy. this way you'll know how its going to paste. If your facing NORTH standing in the front center of the selection the schematic will be placed NORTH of you, front and center. If you face another direction, say south and you paste the same copy job... The schematic is still going to be pasted north of you. time to rotate!! :)
-It matters ware you copied the selection determining ware it will be pasted.
-You can get block ID's from most MC phone apps/crafting guides usually or you can get the TMI mod.

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So.. If you copy your selection from point "A" and later paste it some ware else. The selection will be pasted relative to you as shown at "B". No matter what way you are facing.



This is how to select your selections. It can be from any corner. 1st selection on bottom and 2nd selection on top.