It computes how many levels deep a reply sits and sets the indent width to that many steps, drawing a vertical guide line from top to bottom that connects it to its parent comment each time it expands

GreenLime

This color combination works really well together.
- WaveSound
  
  I feel the same way, especially about the spacing.
  - SummerHill
    
    I'd like the spacing to be a bit wider.
    - GreenLime
      
      Widening it sounds good, I'll reflect that next time.
MintPage

The button size is just right as it is now.
- WaveSound
  
  Right, it's become easier to tap.