This guide explains how to select multiple parts at once in MachineBuilder using both click and drag window methods.
Ctl + Click
To select multiple parts at once, hold Ctrl and Left-click on each subsequent part.
Left Drag Select
Click and hold the left mouse button in open space, then drag from left to right. This action creates a drag window that selects all parts fully inside it.
Right Drag Select
Click and hold the left mouse button in open space, then drag from right to left. This action creates a drag window that selects all parts that come in contact with it.