diff --git a/src/main.rs b/src/main.rs
index a56d958..0dde85b 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -286,6 +286,11 @@ fn run_disclaimer<B: Backend>(terminal: &mut Terminal<B>, app: &mut App) -> Resu
     }
 }
 
+
+/// Scan the local filesystem for Subnautica 2 save folders.
+///
+/// Spawns a background thread for the scan and shows a live elapsed timer.
+/// Caches the first match as `save_path` in config.ini.
 // ── menu actions ───────────────────────────────────────────────────────────
 
 fn action_locate_saves<B: Backend>(terminal: &mut Terminal<B>, app: &mut App) -> Result<()> {
@@ -387,6 +392,7 @@ fn action_locate_saves<B: Backend>(terminal: &mut Terminal<B>, app: &mut App) ->
     Ok(())
 }
 
+/// Recover a .sav from its .bak backup with a rollback safety net.
 fn action_recover_bak<B: Backend>(terminal: &mut Terminal<B>, app: &mut App) -> Result<()> {
     let save_folder = ensure_save_folder(terminal, app)?;
 
@@ -588,6 +594,7 @@ fn action_recover_bak<B: Backend>(terminal: &mut Terminal<B>, app: &mut App) ->
     Ok(())
 }
 
+/// Create a full backup of all savegame files into a timestamped folder.
 fn action_create_backup<B: Backend>(terminal: &mut Terminal<B>, app: &mut App) -> Result<()> {
     let save_folder = ensure_save_folder(terminal, app)?;
 
@@ -629,6 +636,7 @@ fn action_create_backup<B: Backend>(terminal: &mut Terminal<B>, app: &mut App) -
     Ok(())
 }
 
+/// Restore a previously created full backup, overwriting the save folder.
 fn action_restore_backup<B: Backend>(terminal: &mut Terminal<B>, app: &mut App) -> Result<()> {
     let save_folder = ensure_save_folder(terminal, app)?;
     let backup_root = app.backup_root();
@@ -890,6 +898,7 @@ fn ini_delete_action<B: Backend>(
 
 // ── inspect saves ──────────────────────────────────────────────────────────
 
+/// Inspect GVAS metadata for any .sav or .bak file from a file picker.
 fn action_inspect_saves<B: Backend>(terminal: &mut Terminal<B>, app: &mut App) -> Result<()> {
     let save_folder = ensure_save_folder(terminal, app)?;
     let mut files: Vec<_> = std::fs::read_dir(&save_folder)
diff --git a/src/tui.rs b/src/tui.rs
index 7a6eb3f..96f6c69 100644
--- a/src/tui.rs
+++ b/src/tui.rs
@@ -274,6 +274,7 @@ pub fn draw_ok_dialog_styled(f: &mut Frame, app: &AppState, title: &str, lines:
     draw_whale_separator(f, bar, app);
 }
 
+/// Return a rectangle centered in `r` by the given width and height percentages.
 fn centered_rect_size(w: u16, h: u16, r: Rect) -> Rect {
     let popup = Layout::default().direction(Direction::Vertical)
         .constraints([Constraint::Length((r.height.saturating_sub(h))/2), Constraint::Length(h), Constraint::Length((r.height.saturating_sub(h))/2)])
@@ -643,6 +644,7 @@ fn truncate_path_tail(path: &str, max_width: usize) -> String {
 }
 
 /// Create a centered rectangle for modal overlays.
+/// Return a rectangle centered in `r` by the given width and height percentages.
 fn centered_rect(percent_x: u16, percent_y: u16, r: Rect) -> Rect {
     let popup_layout = Layout::default()
         .direction(Direction::Vertical)