Canvas(xlim = NULL, ylim = xlim, xpd=par("xpd"), mar=c(5.1,5.1,5.1,5.1),
asp = 1, bg = par("bg"), ...)
par("xpd")
.plot.window
for details. Default is 1.plot()
command.asp = 1, xaxt = "n", yaxt = "n", xlab = "", ylab = "", frame.plot = FALSE
.Canvas(7)
text(0, 0, "Hello world!", cex=5)
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