ModsJava
Build Mode
An easy to use building mode that eases block placement tedium without introducing time consuming guis or necessitating an item.
⬇ Download on CurseForgeThe author built this one for Minecraft 1.20.1 on Forge. On other versions it may install and then do nothing.
The goal of this mod is just to make the tedious parts of building a little bit easier and doing so in a simple intuitive way.
Press the hotkey (default X) to toggle build mode.
Right click with a block to set the first position.
Drag the bounding box as far as you want the area to extend.
Right click again to finalize and place the blocks.

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Verified by MCModsHub
- Ships as build_mode-1.20.1-1.1.0.jar — drop this file into the mods folder
- Download size: 122 KB
- Download link checked 22 Aug 2026 — working
These come from our own check of the pack file, not from the source page.