Rmarkdown + screenshot fixes

rmarkdown.Rmd

@@ -1,54 +1,3 @@
-```{r include=FALSE, cache=FALSE}
-set.seed(1014)
-options(digits = 3)
-
-knitr::opts_chunk$set(
-  comment = "#>",
-  collapse = TRUE,
-  cache = TRUE,
-  out.width = "70%",
-  fig.align = 'center',
-  fig.width = 6,
-  fig.asp = 0.618,  # 1 / phi
-  fig.show = "hold"
-)
-
-options(dplyr.print_min = 6, dplyr.print_max = 6)
-```
-```{r include=FALSE, cache=FALSE}
-set.seed(1014)
-options(digits = 3)
-
-knitr::opts_chunk$set(
-  comment = "#>",
-  collapse = TRUE,
-  cache = TRUE,
-  out.width = "70%",
-  fig.align = 'center',
-  fig.width = 6,
-  fig.asp = 0.618,  # 1 / phi
-  fig.show = "hold"
-)
-
-options(dplyr.print_min = 6, dplyr.print_max = 6)
-```
-```{r include=FALSE, cache=FALSE}
-set.seed(1014)
-options(digits = 3)
-
-knitr::opts_chunk$set(
-  comment = "#>",
-  collapse = TRUE,
-  cache = TRUE,
-  out.width = "70%",
-  fig.align = 'center',
-  fig.width = 6,
-  fig.asp = 0.618,  # 1 / phi
-  fig.show = "hold"
-)
-
-options(dplyr.print_min = 6, dplyr.print_max = 6)
-```
 # R Markdown
 
 ## Introduction
@@ -184,7 +133,7 @@ Chunks can be given an optional name: ```` ```{r by-name} ````. This has three a
 1.  You can more easily navigate to specific chunks using the drop-down
     code navigator in the bottom-left of the script editor:
 
-    ```{r, echo = FALSE, out.width = NULL}
+    ```{r, echo = FALSE, out.width = "30%"}
     knitr::include_graphics("screenshots/rmarkdown-chunk-nav.png")
     ```