ABSTRACT
The Stack operation arranges meshes in the specified direction to create a stacked formation. The centers are along a line that is parallel to the direction by default, but this can be adjusted to be along some direction. The align direction should be normal to the main direction. There is a hyperplane normal to the direction that separates each adjacent pair of meshes, with some buffer
IMPORTANT ELEMENT
You'll probably use XStack and YStack more, but if you understand the semantics of stack properly, then that should be good enough. Stacks are useful for quickly positioning meshes.