For Minecraft 1.20.1 / Fabric.

Requirements: Java 17; Fabric Loader 0.19.5 or newer; Fabric API 0.92.12+1.20.1 or newer for Minecraft 1.20.1.

Install this JAR on both clients and servers.

Simple Schematics 0.4.0

Added

• Layout map: tick several schematics in the library and choose Layout. Drag them onto a one-block map, where each piece is drawn in its real shape from above. R turns, M mirrors, Page Up and Page Down raise and lower, Delete removes. Pieces may overlap; the later piece wins.
• A faint picture of the ground under the map shows where the layout will go. The Ground button turns it off.
• Done builds the layout as one normal preview, ready for Creative paste or Survival building. Save layout keeps it as a file you can open again.
• Piece preview tool: right-click one piece of a built layout to move, raise, turn or mirror just that piece in the world.

Fixed

• The preview HUD no longer runs under a pinned shopping list.

Updating

• Install the matching JAR on both client and server, as before. Fabric requires Fabric API.

Layout map guide · Simple Schematics wiki