```r
ma1 = tm_shape(nz) + tm_fill(col = "red")
ma2 = tm_shape(nz) + tm_fill(col = "red", alpha = 0.3)
ma3 = tm_shape(nz) + tm_borders(col = "blue")
ma4 = tm_shape(nz) + tm_borders(lwd = 3)
ma5 = tm_shape(nz) + tm_borders(lty = 2)
ma6 = tm_shape(nz) + tm_fill(col = "red", alpha = 0.3) +
  tm_borders(col = "blue", lwd = 3, lty = 2)
tmap_arrange(ma1, ma2, ma3, ma4, ma5, ma6)
```

<div class="figure" style="text-align: center">
<img src="figures/tmstatic-1.png" alt="The impact of changing commonly used fill and border aesthetics to fixed values." width="576" />
<p class="caption">(\#fig:tmstatic)The impact of changing commonly used fill and border aesthetics to fixed values.</p>
</div>