Change the layers position within its parent layer group by
decreasing the index
of the layer by one if possible. This means
that the raised layer will be rendered after (or on top) of its sibling
layer to the left.
Examples
if(interactive()){
p <- l_plot()
l1 <- l_layer_rectangle(p, x=0:1, y=0:1)
l2 <- l_layer_oval(p, x=0:1, y=0:1, color='thistle')
l_aspect(p) <- 1
l_layer_raise(p, l1)
}