  Recently, large gauge transformation (LGT), the residual gauge symmetry after
gauge fixing that survives at null infinity, has drawn much attention
concerning soft theorems and the memory effect. We point out that LGT charges
in quantum electrodynamics are in fact one of non-compact generators of the two
dimensional Euclidean group. Moreover, by comparing two equivalent descriptions
of gauge transformation, we suggest that LGT is simply another way of
describing the gauged little group for massless soft photons.
