In KSP-1 when building a craft you could place parts freely, but if you were to use the move or rotate tool on them they would all snap to some form of universal "grid" that was aligned to your craft. This grid was a global grid, but could be toggled to use a local grid aligned to your selected part, using a button below the move and rotate tools. This was a very useful feature for lining objects up in building a craft, which in KSP2 can be somewhat frustrating as things won't rotate quite to 0 using the snap options, or parts wont quite line up end to end. While turning off snapping and moving the parts freely can get you close, its very difficult to do perfectly due to lack of the snapping, or some kind of angle or distance measurement tool to tell you the rotation or location of the object.
Perhaps not everyone misses it as much as I do, but I really miss it
With the way craft building works in KSP2 I understand it would be more complex since you have multiple crafts in play at once, which are all placed and moved freely, I believe the universal grid should follow the selected craft and probably be set to the anchor part, while the local grid should function how the building does now.
It's also possible this whole post is a waste of time because this feature is implemented and I just don't know how to toggle it, in which case, please help