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Circle Backslash (⍉)
⍉ 𝕩: Transpose
Move the first axis of 𝕩 to the end.
a ← 3‿3 ⥊ ↕9
⍉ a
b ← 1‿2‿3 ⥊ ↕6
≢⍉ b
𝕨 ⍉ 𝕩: Reorder Axes
Rearrange the axes of 𝕩 as per the axis indices in 𝕨.
≢ c ← 2‿3‿4‿5‿6 ⥊1
≢ 1‿3‿2‿0‿4 ⍉ c