title: How to move name of axis in Plotly?
body: <p>I have example like this:</p>
  
  <pre><code>library(data.table)
  library(plotly)
  
  data1&lt;-data.table(rbind(c(0,'Very long text'),c(4,'Very, very, very, very long 
  text')))
  colnames(data1)&lt;- c('A','B')
  
  plot_ly(data=data1,y=~A, x=~B,type='bar') %&gt;%
  layout(xaxis=list(tickangle=45),
       margin=list(b=200))
  </code></pre>
  
  <p>And problem is that the name of xaxis is close to xaxis and it can interfere with tick labels.</p>
  
  <p>Is there possibility to move downward name of xaxis?</p>