You can format text in bold or italic #chunks introduce a code chunk if you want make some calculation exp(1)
exp(1)
## [1] 2.718282
#plots
library(plotly)
## Loading required package: ggplot2
##
## Attaching package: 'plotly'
## The following object is masked from 'package:ggplot2':
##
## last_plot
## The following object is masked from 'package:stats':
##
## filter
## The following object is masked from 'package:graphics':
##
## layout
data("volcano")
plot_ly(z=volcano, type="surface")