# How to add proper labels to sarima.for plot?

I am doing some prediction on time series with the astsa package, using the sarima.for() function. The plotting is fine, but I am not sure how to add proper x-y labels and a title. The function itself doesn't seem to provide these options, and I can't just add them in there as that doesn't seem to work. Is there some work around? Perhaps some other R function I can call before/after to include labels?

edit: It seems possible to use the title() function to add a main title, but I can't overwrite the x/y labels, or change the x-ticks. Does anyone have an idea?