title: Can you arrange a Flexdashboard by rows and columns?
body: <p>I'm trying to create a large dashboard for a 65" display. I have data that consists of varying (1-4) parameters per group with 1 main parameter. I would like to display these groups with one main graph and the parameters graphed individually below it:</p>
  
  <pre><code>[MAIN------GRAPH1]  [MAIN------GRAPH4]
  [PAR1][PAR2][PAR3]  [PAR1][PAR2][PAR3]
  
  [MAIN------GRAPH2]  [MAIN------GRAPH5]
  [PAR---1][PAR---2]  [PAR1][PAR2][PAR3]
  
  [MAIN------GRAPH3]  [MAIN------GRAPH6]
  [PAR1][PAR2][PAR3]  [PAR---1][PAR---2]
  </code></pre>
  
  <p>I have tried arranging the flexdashboard by rows but the result isn't working as expected.</p>
  
  <p>Here's what I have so far:</p>
  
  <pre><code>---
  title: "Dashboard"
  output: 
  flexdashboard::flex_dashboard:
  orientation: rows
  source_code: embed
  ---
  Row {data-height=650}
  -------------------------------------
  
  ### Chart1
  
  ```{r setup, include=FALSE}
  library(dygraphs)
  library(flexdashboard)
  library(readr)
  library(xts)
  
  ```
  ```{r}
  graph 
  ```
  
  Row {data-height=350}
  -------------------------------------
  
  ### Chart1Par1
  
  ```{r}
  first parameter
  ```   
  
  ### Chart1Par2
  
  ```{r}
  second parameter
  ```
  Row {data-height=650}
  -------------------------------------
  
  ### Chart2
  
  ```{r}
  second chart main
  ```
  
  Row {data-height=350}
  -------------------------------------
  
  ### Chart2Par1
  
  ```{r}
  
  ```   
  
  ### Chart2Par2
  
   ```{r}
  
   ```
  </code></pre>
  
  <p>I'm expecting:</p>
  
  <pre><code>[MAIN------GRAPH1]
  [PAR---1][PAR---2]
  
  [MAIN-----------2]
  [PAR2--1][PAR2--2]
  </code></pre>
  
  <p>I'm getting:</p>
  
  <pre><code>[MAIN-------GRAPH1]
  [PAR1][PAR2][MAIN2]
  [PAR2---1][PAR2--2]
  </code></pre>