How to make plot big enough to see every word in R?

Question

plot pic

As the pic resolution is not high enough, I cannot read every word in my cluster dendogram.

How to fix this problem?

Answer 1

As @DavidZ said, we can change the resolution like below;

You can save it by

png("plot.png", width=20, height=20, units="in", res=500)
plot(...) 
dev.off()

plot.png should be saved in your current working directory.