I am interested in having clear visual cues when aligning two different objects during interactions. For instance, in SketchUp, I noticed a green line appears when the connection is accurate. Is there a similar feature in Blender? Connecting two meshes precisely can be challenging without visual indicators or correction colors on the screen. I apologize if this question has been asked before, but I struggled to find relevant information through Google.
When using snapping tools, there are indicators expressing that snapping target was reached.
No line (except for edge perpendicular snapping), but a modification of appearance of mouse pointer.
If you have a doubt about alignment of two objects, or components; you can check their coordinates or you can align them using Align Objects operator or Scale operator, constrained to locations transformations, set to zero.