diff --git a/slides/slides.qmd b/slides/slides.qmd
index f8f81688c12ccc32881e1092e10aa45bb7aa7cdc..3b2405370b82593423e47078384a33a19baae4e9 100644
--- a/slides/slides.qmd
+++ b/slides/slides.qmd
@@ -337,4 +337,29 @@ OPTIONS:
     -h, --help                 Print help information
     -l, --last <N>             consider last N archives [default: 0]
 ```
-<b>
\ No newline at end of file
+<p><p>
+
+
+## Git Borg Linker - checkout
+
+To go back to an old version of the `results` folder you can do a `gblk checkout` after a ` git checkout`. This will *revert your `result` folder* to the way it was at that commit.
+
+
+::: {.callout-warning icon=true}
+
+Doing a checkout without hooks might be risky because any unsaved change in your `results` folder will be lost
+
+:::
+
+To *avoid losing data* without hooks use the `gblk pre-co` command before the `git checkout` command
+
+The workflow is the following
+
+```bash
+# without hooks
+gblk pre-co # checks if there is no new data inside the results folder
+git co DESTINATION
+gblk co
+```
+<p><p>
+
diff --git a/slides/style.css b/slides/style.css
index 8f044f30ccf4234d009c3b7e35ede42e8c871c8b..161377f3f29de311c48de7f8da04db95f62b7988 100644
--- a/slides/style.css
+++ b/slides/style.css
@@ -74,6 +74,7 @@
     background-color: rgb(214, 214, 214);
     color: rgb(0, 0, 0);
     font-family: monospace;
+    font-size: 0.9em;
 }
 
 .reveal li code {
@@ -81,6 +82,7 @@
     background-color: rgb(214, 214, 214);
     color: rgb(0, 0, 0);
     font-family: monospace;
+    font-size: 0.9em;
 }
 
 .reveal .callout.callout-captioned .callout-icon::before {