How to resize and save plots in png format?

Question

I would like to plot the results from a quantile regression, but am not able to:

1. control the dimensions/size of the plots and
2. save the plots as png.

Answer 1

For subdividing the plots:

plot(fit1,parm=1:2)
plot(fit1,parm=3)

Note that you could have found the answer by careful reading of ?plot.summary.rqs, but this may not have been obvious: in order to know where to look you would need to do class(fit1) to figure out which plot method was being used.

Roman's answer takes care of the image dimension stuff.