diff --git a/materials/sections/provenance-reproducibility-datapaper.qmd b/materials/sections/provenance-reproducibility-datapaper.qmd
index e89b09a3..6068d97f 100644
--- a/materials/sections/provenance-reproducibility-datapaper.qmd
+++ b/materials/sections/provenance-reproducibility-datapaper.qmd
@@ -4,10 +4,14 @@
 - Learn how to use R to package your work by building a reproducible paper in RMarkdown/Quarto
 - Introduce tools and techniques for reproducibility supported by the NCEAS and DataONE
 
+<!--
 :::callout-note
 [Download slides](files/repro-sci.pdf)
 :::
 
+-->
+
+
 ### Reproducible Research: Recap 
 
 Working in a reproducible manner:
@@ -211,6 +215,28 @@ What if I want a template from another journal, different from the Journal of Ar
 
 The [`rticles`](https://github.com/rstudio/rticles%20B) package provides a lot of other great templates for formatting your paper specifically to the requirements of many journals. In addition to a custom CSL file for reference customization, `rticles` supports custom LATeX templates that fit the formatting requirements of each journals. 
 
+:::callout-important
+## Tinytex and rendering to PDF
+To be able to render your document to PDF you need to have `tinytex` installed in your machine.
+
+In the console run:
+
+
+```{r}
+#| eval: false
+#| 
+install.packages('tinytex') ## this package is already installed in our server
+
+tinytex::install_tinytex() ## this may take several minutes
+
+```
+
+
+
+:::
+
+
+
 ::: callout-tip
 
 ## Set up
diff --git a/materials/session_20.qmd b/materials/session_20.qmd
index b979b592..64f53fc5 100644
--- a/materials/session_20.qmd
+++ b/materials/session_20.qmd
@@ -3,4 +3,7 @@ title: "Reproducibility & Provenance"
 title-block-banner: true
 ---
 
+
+
+
 {{< include /sections/provenance-reproducibility-datapaper.qmd >}}
\ No newline at end of file