diff --git a/src/app/cover_renderer.rs b/src/app/cover_renderer.rs
index cdca61c..3c3ea80 100644
--- a/src/app/cover_renderer.rs
+++ b/src/app/cover_renderer.rs
@@ -8,6 +8,9 @@ use std::{
 
 use crate::infrastructure::logging::Logger;
 
+/// Choices for showing the cover letter.
+///
+/// You can show it as plain text or use tools like `bat` to add colors.
 #[derive(Debug, Serialize, Deserialize, Clone, Copy, Default)]
 pub enum CoverRenderer {
     #[default]
@@ -17,6 +20,7 @@ pub enum CoverRenderer {
     Bat,
 }
 
+/// Creates a renderer choice from a String.
 impl From<String> for CoverRenderer {
     fn from(value: String) -> Self {
         match value.as_str() {
@@ -26,6 +30,7 @@ impl From<String> for CoverRenderer {
     }
 }
 
+/// Creates a renderer choice from a string slice.
 impl From<&str> for CoverRenderer {
     fn from(value: &str) -> Self {
         match value {
@@ -35,6 +40,7 @@ impl From<&str> for CoverRenderer {
     }
 }
 
+/// Turns the choice back into a String.
 impl Display for CoverRenderer {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         match self {
@@ -44,6 +50,9 @@ impl Display for CoverRenderer {
     }
 }
 
+/// Decides how to show the cover letter.
+///
+/// It looks at the settings and calls the right function to format the text.
 pub fn render_cover(raw: &str, renderer: &CoverRenderer) -> color_eyre::Result<String> {
     let text = match renderer {
         CoverRenderer::Default => Ok(raw.to_string()),
@@ -53,17 +62,17 @@ pub fn render_cover(raw: &str, renderer: &CoverRenderer) -> color_eyre::Result<S
     Ok(text)
 }
 
-/// Renders a .mbx cover using the `bat` command line tool.
+/// Formats the cover letter using the `bat` command.
 ///
 /// # Errors
 ///
-/// If bat isn't installed or if the command fails, an error will be returned.
+/// Fails if `bat` is not installed or has an error.
 fn bat_cover_renderer(patch: &str) -> color_eyre::Result<String> {
     let mut bat = Command::new("bat")
-        .arg("-pp")
-        .arg("-f")
-        .arg("-l")
-        .arg("mbx")
+        .arg("-pp") // Plain mode: no paging or extra decorations
+        .arg("-f") // Force: keep colors even if piping
+        .arg("-l") // Language: set the language type
+        .arg("mbx") // Mailbox format
         .stdin(Stdio::piped())
         .stdout(Stdio::piped())
         .spawn()
@@ -72,7 +81,10 @@ fn bat_cover_renderer(patch: &str) -> color_eyre::Result<String> {
             e
         })?;
 
+    // Sends the text to bat
     bat.stdin.as_mut().unwrap().write_all(patch.as_bytes())?;
+
+    // Waits for bat to finish and gets the result
     let output = bat.wait_with_output()?;
     Ok(String::from_utf8(output.stdout)?)
 }