diff --git a/plugin-dev-workspace.kdl b/plugin-dev-workspace.kdl
index 318cd6f..95efd79 100644
--- a/plugin-dev-workspace.kdl
+++ b/plugin-dev-workspace.kdl
@@ -40,8 +40,8 @@ layout {
             tab_sync_indicator      "S"
             tab_fullscreen_indicator "FS"
             tab_display_count       "3"
-            tab_truncate_start_format "#[fg=red,bg=#181825] < ..."
-            tab_truncate_end_format "#[fg=red,bg=#181825] ...>"
+            tab_truncate_start_format "#[fg=red,bg=#181825] < +{count} ..."
+            tab_truncate_end_format "#[fg=red,bg=#181825] ... +{count} >"
 
             command_0_command      "echo \"平仮名, ひらがな 📦\""
             command_0_clickaction "bash -c \"zellij --session zjstatus-dev pipe 'zjstatus::notify::hello world!' -n zjstatus\""
diff --git a/src/widgets/tabs.rs b/src/widgets/tabs.rs
index a5bb45a..0ffbb6b 100644
--- a/src/widgets/tabs.rs
+++ b/src/widgets/tabs.rs
@@ -110,9 +110,15 @@ impl Widget for TabsWidget {
         let (truncated_start, truncated_end, tabs) =
             get_tab_window(&state.tabs, self.tab_display_count);
 
-        if truncated_start {
+        if truncated_start > 0 {
             if let Some(f) = &self.tab_truncate_start_format {
-                output = format!("{}{output}", f.format_string(&f.content));
+                let mut content = f.content.clone();
+
+                if content.contains("{count}") {
+                    content = content.replace("{count}", (truncated_start).to_string().as_str());
+                }
+
+                output = format!("{}{output}", f.format_string(&content));
             }
         }
 
@@ -129,9 +135,15 @@ impl Widget for TabsWidget {
             }
         }
 
-        if truncated_end {
+        if truncated_end > 0 {
             if let Some(f) = &self.tab_truncate_end_format {
-                output = format!("{output}{}", f.format_string(&f.content));
+                let mut content = f.content.clone();
+
+                if content.contains("{count}") {
+                    content = content.replace("{count}", (truncated_end).to_string().as_str());
+                }
+
+                output = format!("{output}{}", f.format_string(&content));
             }
         }
 
@@ -153,9 +165,15 @@ impl Widget for TabsWidget {
             .position
             + 1;
 
-        if truncated_start {
+        if truncated_start > 0 {
             if let Some(f) = &self.tab_truncate_start_format {
-                offset = console::measure_text_width(&f.format_string(&f.content));
+                let mut content = f.content.clone();
+
+                if content.contains("{count}") {
+                    content = content.replace("{count}", (truncated_end).to_string().as_str());
+                }
+
+                offset = console::measure_text_width(&f.format_string(&content));
 
                 if pos <= offset {
                     switch_tab_to(active_pos.saturating_sub(1) as u32);
@@ -186,9 +204,15 @@ impl Widget for TabsWidget {
             offset += content_len;
         }
 
-        if truncated_end {
+        if truncated_end > 0 {
             if let Some(f) = &self.tab_truncate_end_format {
-                offset += console::measure_text_width(&f.format_string(&f.content));
+                let mut content = f.content.clone();
+
+                if content.contains("{count}") {
+                    content = content.replace("{count}", (truncated_end).to_string().as_str());
+                }
+
+                offset += console::measure_text_width(&f.format_string(&content));
 
                 if pos <= offset {
                     switch_tab_to(cmp::min(active_pos + 1, state.tabs.len()) as u32);
@@ -312,14 +336,17 @@ impl TabsWidget {
     }
 }
 
-pub fn get_tab_window(tabs: &Vec<TabInfo>, max_count: Option<usize>) -> (bool, bool, Vec<TabInfo>) {
+pub fn get_tab_window(
+    tabs: &Vec<TabInfo>,
+    max_count: Option<usize>,
+) -> (usize, usize, Vec<TabInfo>) {
     let max_count = match max_count {
         Some(count) => count,
-        None => return (false, false, tabs.to_vec()),
+        None => return (0, 0, tabs.to_vec()),
     };
 
     if tabs.len() <= max_count {
-        return (false, false, tabs.to_vec());
+        return (0, 0, tabs.to_vec());
     }
 
     let active_index = tabs.iter().position(|t| t.active).expect("no active tab");
@@ -327,8 +354,8 @@ pub fn get_tab_window(tabs: &Vec<TabInfo>, max_count: Option<usize>) -> (bool, b
     // active tab is in the last #max_count tabs, so return the last #max_count
     if active_index > tabs.len().saturating_sub(max_count) {
         return (
-            true,
-            false,
+            tabs.len().saturating_sub(max_count),
+            0,
             tabs.iter()
                 .cloned()
                 .rev()
@@ -342,12 +369,9 @@ pub fn get_tab_window(tabs: &Vec<TabInfo>, max_count: Option<usize>) -> (bool, b
     let first_index = active_index.saturating_sub(1);
     let last_index = cmp::min(first_index + max_count, tabs.len());
 
-    let truncated_start = first_index > 0;
-    let truncated_end = last_index < tabs.len();
-
     return (
-        truncated_start,
-        truncated_end,
+        first_index,
+        tabs.len().saturating_sub(last_index),
         tabs.as_slice()[first_index..last_index].to_vec(),
     );
 }
@@ -389,7 +413,7 @@ mod test {
             },
         ],
         Some(3),
-        (true, true, vec![
+        (1, 1, vec![
                 TabInfo {
                     active: false,
                     name: "2".to_owned(),
@@ -437,7 +461,7 @@ mod test {
             },
         ],
         Some(3),
-        (false, true, vec![
+        (0, 2, vec![
                 TabInfo {
                     active: true,
                     name: "1".to_owned(),
@@ -485,7 +509,7 @@ mod test {
             },
         ],
         Some(3),
-        (false, true, vec![
+        (0, 2, vec![
                 TabInfo {
                     active: false,
                     name: "1".to_owned(),
@@ -533,7 +557,7 @@ mod test {
             },
         ],
         Some(3),
-        (true, false, vec![
+        (2, 0, vec![
                 TabInfo {
                     active: false,
                     name: "3".to_owned(),
@@ -581,7 +605,7 @@ mod test {
             },
         ],
         Some(3),
-        (true, false, vec![
+        (2, 0, vec![
                 TabInfo {
                     active: false,
                     name: "3".to_owned(),
@@ -629,7 +653,7 @@ mod test {
             },
         ],
         None,
-        (false, false, vec![
+        (0, 0, vec![
             TabInfo {
                 active: false,
                 name: "1".to_owned(),
@@ -672,7 +696,7 @@ mod test {
             },
         ],
         Some(3),
-        (false, false, vec![
+        (0, 0, vec![
             TabInfo {
                 active: false,
                 name: "1".to_owned(),
@@ -705,7 +729,7 @@ mod test {
             },
         ],
         Some(3),
-        (false, false, vec![
+        (0, 0, vec![
             TabInfo {
                 active: false,
                 name: "1".to_owned(),
@@ -727,7 +751,7 @@ mod test {
     pub fn test_get_tab_window(
         #[case] tabs: Vec<TabInfo>,
         #[case] max_count: Option<usize>,
-        #[case] expected: (bool, bool, Vec<TabInfo>),
+        #[case] expected: (usize, usize, Vec<TabInfo>),
     ) {
         let res = get_tab_window(&tabs, max_count);