From Medieval Engineers Wiki
Within Medieval Engineers there is the ability to change the world in many ways. There are controls for the movement and rotation of blocks and items for use in Building.
|+||Moves block closer|
|+||Moves block farther|
|Default Key 1||Default Key 2||Action|
|Rotate block Vertical +|
|Rotate block Vertical -|
|Rotate block Roll +|
|+||Rotate block Roll -|
|Rotate block Horizontal +|
|+||Rotate block Horizontal -|
|Building mode||This switches between static(stationary) and dynamic(active/loose) building types within the environment.|
|Enable Compound building mode||Holding this key will turn on Compound building mode until the key is released.|
|Toggle Compound building mode||Pressing this key will toggle Compound building mode on or off.|
There is also more Creative Controls for additional building methods.