Suggestion: how to swap variables

[ghost]

Is your feature request related to a problem? Please describe.
I wanted to know how to swap variables. Therefore, I looked for swap.
The current results are:

APL Phrase	Explanation
X f⍨Y	Commute: same as Y f X
Z f⍨X,Y	Avoiding parentheses by swapping arguments in (X,Y) f Z
(¯11○+)N	Swap real and imaginary
{⌽@(1,≢⍵)⊢⍵}Y	Interchange first and last major cells
{n=≢∪n|⍵+⍳n←≢⍵}Jv	Valid siteswap pattern?

These phrases do not allow me to perform this action.

Describe the solution you'd like
I would have included an APL phrase based on an example given in Bernard Legrand, Mastering Dyalog APL: A Complete Introduction to Dyalog APL (2009), Chapter X, B-5:

APL Phrase	Explanation
X[4 6] ← X[6 4]	Swap two variables

Describe alternatives you've considered
N/A

Additional context
I am a beginner APL programmer.

[ghost]

Unsuitably labelled as bug instead of content request.