Add document on Solo, Couple, and Merge

1 files changed, 2 insertions, 2 deletions

diff --git a/doc/leading.md b/doc/leading.md
index 95fde0fa..35d72295 100644
--- a/doc/leading.md
+++ b/doc/leading.md
@@ -28,7 +28,7 @@ In these three cases above, the results are the same as you would get from trans
         ∾˝ a                  # Join the cells
         ∾˝˘ a                 # Join-insert is a no-op on lists
 
-Solo (`≍`), something of a maverick, manages to act on *zero* leading axes of its argument by creating the first axis of the *result* instead. Because it doesn't need any axis to work, it can go in front of either axis but also past the last one by working with rank 0, a case where most array functions would give an error.
+[Solo](couple.md) (`≍`), something of a maverick, manages to act on *zero* leading axes of its argument by creating the first axis of the *result* instead. Because it doesn't need any axis to work, it can go in front of either axis but also past the last one by working with rank 0, a case where most array functions would give an error.
 
         ≢ ≍ a                 # Solo adds a length-1 axis
         a ≡ ⊏ ≍ a             # First Cell undoes this
@@ -59,7 +59,7 @@ The Each (`¨`) and Table (`⌜`) modifiers return functions which are the same
 
 ## Dyadic functions
 
-For dyadic functions the pattern of working on only one argument axis is not so common. Only two functions can be said to follow it roughly: Join to (`∾`) combines two arrays along one axis, using the first axis of both arguments if they have the same rank and of the higher-rank argument if they differ by one. Couple (`≍`), like Solo, does not manipulate the argument axes but adds a result axis. There are also some functions that can't be limited to leading axes: Reshape (`⥊`) treats the argument as one long list, and Pick (`⊑`) requires each index to be as long as the right argument's rank, because it selects elements and not cells from the right argument.
+For dyadic functions the pattern of working on only one argument axis is not so common. Only two functions can be said to follow it roughly: Join to (`∾`) combines two arrays along one axis, using the first axis of both arguments if they have the same rank and of the higher-rank argument if they differ by one. [Couple](couple.md) (`≍`), like Solo, does not manipulate the argument axes but adds a result axis. There are also some functions that can't be limited to leading axes: Reshape (`⥊`) treats the argument as one long list, and Pick (`⊑`) requires each index to be as long as the right argument's rank, because it selects elements and not cells from the right argument.
 
 ### Multiple axes