I am using rmarkdown to make beamer presentations in RStudio. I would want to get slide tickers on the top of presentation. Dresden theme should support those tickersDresden

So is it possible to get those tickers by using rmarkdown? When I knit pdf I get presentation without slide tickers.
Example code:
---
title: "Example"
output: beamer_presentation
theme: Dresden
---
# R Markdown
This is an R Markdown presentation. Markdown is a simple formatting syntax for authoring HTML, PDF, and MS Word documents. For more details on using R Markdown see <http://rmarkdown.rstudio.com>.
When you click the **Knit** button a document will be generated that includes both content as well as the output of any embedded R code chunks within the document.
# Slide with Bullets
- Bullet 1
- Bullet 2
- Bullet 3
# Slide with R Code and Output
```{r}
summary(cars)
```
# Slide with Plot
```{r, echo=FALSE}
plot(cars)
```

