Packaging Maps for Release
Note:MCEdit is no longer being updated by codewarrior0 and is being continued by a small group over on Khroki's Fork. There you can find updates for 1.8 and up.
Note:Do not prune chunks inside the rectangle, as this will make the map difficult to work with. A few empty chunks will make no significant difference in map size.
Chunk Controlbutton on the bottom right.
Note:You must be in "Chunk View" in order for this to work.
Prunebutton in the sidebar on the left. That’s it! Your map is now pruned. Save with
CTRL+S, then you can close MCEdit. Be sure to remove any folders or files generated by MCEdit.
Thanks to Plastix and Timothee38 for the images!