Navigation Controls
s Move to n+1
w Move to n-1
d Move to next page E{r+1} (same space)
a Move to previous page E{r-1} (same space)
e E-map split-screen: Sn beside Sn+1
h H-map split-screen: Sn beside S2n-1
p P-map split-screen (odd n≥5): Sn beside S(n-1)/2
c C2-map split-screen: Sn beside 𝕊/2
E/H/P/C Same split-screen, with the map image highlighted