Ok, this Mod is Great and a life saver - Brilliant.
For a future challenge - Can you have an option to Flip or Mirror a BP about an axis. For instance, when making an array of smelters, it's nice to be able to mirror one side of the output belt onto the other side of the belt.
Along those same lines - it would be wonderful to be able to rotate a BP so that in preview mode, it fits better in the window, and be able to save it in that orientation.

Great game, Great Mod - keep up the incredible work.
Randy

For the meantime you can use https://mods.factorio.com/mod/blueprint_flip_and_turn, but I agree it would be a nice feature.

Hi, as Damokles mentions, such mod for flipping already exists so I don't really feel tempted to do that. If I wanted to add such functionality I'd do it exactly the same way.

Regarding rotation, you can Ctrl+X the whole blueprint in the editor and Ctrl+V it rotated, I guess that would solve it. I can't say I run into that issue often, and it has a simple solution so I don't really want to add a button for that.