copy_region(source, srcMinX, srcMinY, srcMinZ, srcMaxX, srcMaxY, srcMaxZ, destX, destY, destZ, [ignore…])

• What it does:
  Takes the rectangular region you specify in the source Schematic (defined by the two opposite corners srcMin* → srcMax*, inclusive) and pastes it into the receiving schematic so that the source-region’s minimum corner lines up with (destX,destY,destZ).

• Ignored blocks:
  Any block whose ID matches one in the optional ignore array is skipped during the copy—handy for leaving air or placeholder blocks behind.

• Result:
  All non-ignored blocks inside the selected cuboid appear at the destination, keeping their exact relative positions. Great for stamping repeated motifs (like the cyan and lime wool crosses in your example) without bringing along unwanted air.