  We prove that the Losev--Manin compactification of the space of
configurations of $n$ points on ${\mathbb P}^1 \backslash \{0,\infty\}$ modulo
scaling degenerates (isotrivially) to a compactification of the space of
configurations of $n$ points on ${\mathbb A}^1$ modulo translation. The latter
resembles the compactification constructed by Ziltener and Mau--Woodward, but
allows the marked points to coincide, making it a ${\mathbb
G}_a^{n-1}$-variety, which mirrors the fact that the Losev--Manin space is
toric. The degeneration is compatible with the actions of ${\mathbb G}_m^{n-1}$
and ${\mathbb G}_a^{n-1}$ in the sense that these actions fit together globally
in the total space of the degeneration.
