The Schematic Stick sets the lower-right and upper-left corners of a space that can be saved as a Schematic file. To use it, FIRST click the lowest most northwest block of the space. SECOND, click the highest, most southeast, block of the space. Finally, type the command /sch save <schematic file name>.
The /sch command has five primary options: /sch list <search> – displays a list of schematics in the schematics folder that contain the characters in the <search> parameter. The display shows the width, length and height of the schematic (WLH). /sch show <schematic name> – shows where the schematic will be placed in your world