R is for
Authoring!!

OOH Session #118…
Xaringan!!

Open Office Hours
(February 27, 2026)

  • Recap session #117
  • Today’s topic(s):
  • Shared problem-solving







Reminder – check it out!!

Fantastic resource!!

First…

Recap of Session
#117:

watermarks

background-image and background-opacity attributes (as well as others) can be added to slide title via inline curly brackets:

## Hello, There {background-image="rainbowcat.jpg" background-opacity=".5"}

This presentation will show you...

Note

Quarto extension works well for both formats

---
title: "Quarto Watermark Extension Example"
abstract: "This is an example document of quarto watermark extension."

filters:
  - watermark

watermark:
  text: "SAMPLE"
  size: 4
  angle: 45   
  color: "#444444"   
  opacity: 0.2
  cols: 1
  rows: 1
  col-space: 10
  row-space: 10
  z-index: 1            

format: pdf
---

## Text

Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.

## Table

| Command | Description |
| --- | --- |
| `git status` | List all *new or modified* files |
| `git diff` | Show file differences that **haven't been** staged |

## Figure

![How qmd works](https://quarto.org/docs/get-started/hello/images/rstudio-qmd-how-it-works.png)
1
change to whatever text you’re interested in displaying
2
seems to carry most weight for (repeated vs solitary) display of watermark
3
ranges from 0 (transparent) to 1 (opaque) – desired effect will depend on color specification (line #12)
4
can be commented out (along with size on line #10) to reduce/enhance repeated effect
5
html or pdf equally effective – not intended for typst documents

Today…

Xaringan!!

Session Info (February 27, 2026) Rendering:

sessionInfo()
R version 4.5.0 (2025-04-11 ucrt)
Platform: x86_64-w64-mingw32/x64
Running under: Windows 10 x64 (build 19045)

Matrix products: default
  LAPACK version 3.12.1

locale:
[1] LC_COLLATE=English_United States.utf8 
[2] LC_CTYPE=English_United States.utf8   
[3] LC_MONETARY=English_United States.utf8
[4] LC_NUMERIC=C                          
[5] LC_TIME=English_United States.utf8    

time zone: America/Chicago
tzcode source: internal

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

loaded via a namespace (and not attached):
 [1] compiler_4.5.0    fastmap_1.2.0     cli_3.6.5         tools_4.5.0      
 [5] htmltools_0.5.8.1 otel_0.2.0        rstudioapi_0.17.1 yaml_2.3.10      
 [9] rmarkdown_2.30    knitr_1.51        jsonlite_2.0.0    xfun_0.52        
[13] digest_0.6.37     rlang_1.1.6       evaluate_1.0.5