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I am plotting spatial map, using 'plot.sf' function in which key shows the values from breaks like legend. I want to change the size of these values and making bold. I am trying to make the key values bold but not working. Please help me changing the key values size and making them bold.

plot(merge_yield["water volume"], breaks = c(0.0,2000, 4000, 6000, 8000, 10000, 12000),
     pal = colorRampPalette(c("orange", "green")), 
     main = "water volume in 2018",
     key.pos = 4, axes = TRUE, key.width = lcm(1.3), key.length = 1.0,
      cex.main = 1.50)
RJ34
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  • Can you make your post [reproducible](https://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example) by providing `dput(merge_yield)`? – jrcalabrese Nov 26 '22 at 17:59

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