RStudio suddenly stopped showing plots in the plot pane

Question

RStudio is not showing the generated plots in the plot pane anymore. Instead they open in a separate file with the name "Quartz". Here\'s my session info.:

Answer 1

I am working with Rmarkdown, and in my case I solved this problem like this:

1. Go to Tools->Global Options->Rmarkdown

2. In "Show output preview in" select "Viewer Pane"

3. Uncheck the box "Show output inline for all R Markdown documents"