Me gustaría modificar los saltos y límites del eje y de cada uno de los gráficos en facet_wrap. Quiero, por ejemplo, reducir los descansos para algunos de ellos o quiero que comiencen desde 0.

ggplot(granuControlLw, aes(distance, group=time)) 
+ geom_line(aes(y = D))  + xlab("Distance from the gate (m)")
+ geom_point(aes(y = D, shape = factor(time)), size=4.5) + theme_bw()  
+ theme(axis.text.x = element_text(size = 15, angle = 90), axis.text.y = element_text(size = 15, angle = 0)) 
+ scale_x_continuous(breaks=seq(-50,1100,50))  
+ theme(axis.text = element_text(size = 15),axis.title = element_text(size = 15),legend.title = element_text(size = 15, face = 'bold'),legend.text= element_text(size=15), axis.line = element_line(colour = "gray"))
 + theme(strip.background = element_blank())
 + facet_wrap (evolution~ section, scale="free_y", ncol=1) 

Here is a few raws of my input file:
evolution   time    distance    section D
D5     After    680     (> S450)    0.8286370543
D5     After    710     (> S450)    1.0857412286
D5     After    950     (> S450)    0.29524528
D5     After    1010    (> S450)    0.7115190438
D16    After    680     (> S450)    2.7797109467
D16    After    710     (> S450)    4.2948672219
D16    After    950     (> S450)    0.5445345574
D16    After    1010    (> S450)    2.9139811532
D25    After    680     (> S450)    5.3764331372
D25    After    710     (> S450)    6.6094309926
D25    After    950     (> S450)    0.789626722
D25    After    1010    (> S450)    6.25184791
D50    After    680     (> S450)    13.0637943297
D50    After    710     (> S450)    17.155345894
D50    After    950     (> S450)    3.2134971025
D50    After    1010    (> S450)    18.9873626321
D75    After    680     (> S450)    19.491433335
D75    After    710     (> S450)    26.1926456265
D75    After    950     (> S450)    12.4823051787
D75    After    1010    (> S450)    45.0209667314