How to set plotly chart to have a transparent background in R?
<p>Here's what I have, so far:</p>

<pre><code>f1 &lt;- list(
   family = "Arial, sans-serif",
   size = 25,
   color = "white"
)
f2 &lt;- list(
   family = "Old Standard TT, serif",
   size = 14,
   color = "black"

)
a &lt;- list(
   title = "SALES PER SONG",
   titlefont = f1,
   showgrid = FALSE,
   showticklabels = TRUE,
   showline=TRUE,
   tickangle = 45,
   tickfont = f2
  )

 salesplot &lt;-plot_ly(producersales, type="scatter", x=Producer, y=SalesPerSong, color=SongRange, colors=cols, mode="markers", size=SalesPerSong) %&gt;% 
layout(xaxis = a, yaxis = a)
</code></pre>

<p>I tried adding <code>paper_bgcolor=#00000000, plot_bgcolor=#00000000</code> after the x and y axis information within <code>layout()</code>, but when I run the command, I get the plus sign. I don't know what to do, so any help is appreciated. Thanks!</p>