Undergrounds "the other way"

[AdamK]

Factorio should help placing undergrounds "the other way". When we try to place them "the other way" ( < > instead of > < ), game should place belts to join them (ie. <====>).

Why?

Helps when reenginering sphagetti into more sphagetti

[Illiander42]

But what if I want them the "wrong" way? That lets you do really cool stuff!

[AdamK]

Then there might be some modifier key (Alt, Ctrl, Shift) for this feature.