[R] How to save as PDF when I used par(ask=T)

[casperyc]

======================================================
y=c(9,9,17,11,7,8,15,5)

treat=c("A","C","B","C","D","A","B","D")

block=c(1,1,2,2,2,3,3,3)

q1.mod=aov(y~as.factor(treat)+as.factor(block))
q1.mod
summary(q1.mod)

par(ask=T)
plot(TukeyHSD(q1.mod))
=======================================================

This way, I can only save the last picture that is displayed.
(when I try to save the first one,
the only button i can press is ''Next'')

How do I save the previous one?

Thanks.

casper
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