diff --git a/src/config.rs b/src/config.rs
index 657980c..4ae0417 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -1,3 +1,5 @@
+//! load, save configuration and parse cli args
+
 use clap::{ArgEnum, Parser};
 use fltk::dialog;
 use fltk_theme::ThemeType;
@@ -57,6 +59,7 @@ impl Into<ThemeType> for Themes {
     }
 }
 
+/// Configuation file
 #[derive(Debug, Serialize, Deserialize)]
 pub struct ConfigFile {
     pub quote_font_ttf: String,
diff --git a/src/config_window.rs b/src/config_window.rs
index 1fad536..c68054b 100644
--- a/src/config_window.rs
+++ b/src/config_window.rs
@@ -1,3 +1,5 @@
+//! Window to edit configuration
+
 use std::{cell::RefCell, rc::Rc};
 
 use fltk::{
diff --git a/src/draw_thread.rs b/src/draw_thread.rs
index f6d7c39..8e66b4b 100644
--- a/src/draw_thread.rs
+++ b/src/draw_thread.rs
@@ -24,10 +24,15 @@ use crate::utils::{ImageContainer, ImageProperties};
 
 #[derive(Debug, Clone)]
 pub(crate) enum DrawMessage {
-    Open, // Open file or cropped file
+    /// Open file or cropped file
+    Open,
+    /// Load file with specific cropped size
     ChangeCrop((f64, f64)),
+    /// Recalculate and draw on buffer image in Container
     Recalc,
+    /// Flush buffer to u8 vector present in main, to draw on screen
     Flush,
+    /// Save to file
     Save,
 }