diff --git a/src-tauri/src/core/core.rs b/src-tauri/src/core/core.rs
index 9e25c2c..4bbcd88 100644
--- a/src-tauri/src/core/core.rs
+++ b/src-tauri/src/core/core.rs
@@ -3,7 +3,11 @@ use once_cell::sync::OnceCell;
 use paris::{error, info};
 use serde::{Deserialize, Serialize};
 
-use std::{collections::{HashMap, HashSet}, sync::Arc, time::Duration};
+use std::{
+    collections::{HashMap, HashSet},
+    sync::Arc,
+    time::Duration,
+};
 use tauri::async_runtime::RwLock;
 use tokio::{
     sync::mpsc,
@@ -13,7 +17,7 @@ use tracing::warn;
 
 use crate::{
     picker::{
-        config::DisplayConfig, display_picker::DisplayPicker, led_color::LedColor, manager::Picker,
+        self, config::DisplayConfig, display_picker::DisplayPicker, led_color::LedColor,
         screenshot::Screenshot,
     },
     rpc,
@@ -90,12 +94,16 @@ impl CoreManager {
 
     pub async fn play_follow(&self) -> anyhow::Result<()> {
         let mut futs = vec![];
-        let configs = Picker::global().await.display_configs.lock().await;
+        let configs = picker::config::Manager::global().reload_config().await;
+        let configs = match configs {
+            Ok(c) => c.display_configs,
+            Err(err) => anyhow::bail!("can not get display configs. {:?}", err),
+        };
         info!("piker display configs: {:?}", configs);
 
         let (tx, mut rx) = mpsc::channel(10);
 
-        for config in configs.to_owned() {
+        for config in configs.clone() {
             let tx = tx.clone();
             let fut = tokio::spawn(async move {
                 match Self::follow_display_by_config(config, tx).await {
@@ -108,8 +116,7 @@ impl CoreManager {
             futs.push(fut);
         }
 
-        let total_colors_count = configs
-            .iter()
+        let total_colors_count = configs.iter()
             .flat_map(|c| {
                 vec![
                     c.led_strip_of_borders.top,
@@ -125,7 +132,8 @@ impl CoreManager {
                 None => {
                     vec![]
                 }
-            }).collect::<HashSet<_>>()
+            })
+            .collect::<HashSet<_>>()
             .len();
         tokio::spawn(async move {
             let mut global_colors = HashMap::new();
diff --git a/src-tauri/src/picker/config/manger.rs b/src-tauri/src/picker/config/manger.rs
index d8751da..4d9d8f0 100644
--- a/src-tauri/src/picker/config/manger.rs
+++ b/src-tauri/src/picker/config/manger.rs
@@ -2,7 +2,8 @@ use std::{
     env::current_dir,
     fs::{self, File},
     io::Read,
-    path::PathBuf, sync::Arc,
+    path::PathBuf,
+    sync::Arc,
 };
 
 use once_cell::sync::OnceCell;
@@ -43,7 +44,9 @@ impl Manager {
     }
 
     pub fn new(config: Configuration) -> Self {
-        Self { config: Arc::new(Mutex::new(config)) }
+        Self {
+            config: Arc::new(Mutex::new(config)),
+        }
     }
 
     pub fn get_config_file_path() -> PathBuf {
@@ -70,7 +73,10 @@ impl Manager {
             .map_err(|error| anyhow::anyhow!("can not parse config file contents. {}", error))
     }
 
-    pub fn write_config_to_disk(config_file_path: PathBuf, config: &Configuration) -> anyhow::Result<()> {
+    pub fn write_config_to_disk(
+        config_file_path: PathBuf,
+        config: &Configuration,
+    ) -> anyhow::Result<()> {
         let contents = serde_json::to_string(config)
             .map_err(|error| anyhow::anyhow!("can not serialize config. {}", error))?;
         info!("contents: {}", contents);
@@ -86,6 +92,13 @@ impl Manager {
         let mut config = self.config.lock().await;
         *config = new_config.clone();
     }
+    pub async fn reload_config(&self) -> anyhow::Result<Configuration> {
+        let mut config = self.config.lock().await;
+        let new_config = Self::read_config_from_disk(Self::get_config_file_path())
+            .map_err(|err| anyhow::anyhow!("can not reload config. {:?}", err))?;
+        *config = new_config.clone();
+        return anyhow::Ok(new_config);
+    }
 }
 
 #[cfg(test)]
@@ -103,9 +116,11 @@ mod tests {
         let temp = TestDir::temp().create("config_dir", test_dir::FileType::Dir);
         let config_file_path = temp.path("config_dir").join("picker.config.json");
         let manager = crate::picker::config::manger::Manager::default();
-        crate::picker::config::manger::Manager
-            ::write_config_to_disk(config_file_path.clone(), &Configuration::default())
-            .unwrap();
+        crate::picker::config::manger::Manager::write_config_to_disk(
+            config_file_path.clone(),
+            &Configuration::default(),
+        )
+        .unwrap();
 
         let contents = fs::read_to_string(config_file_path.clone()).unwrap();
         let _config: Configuration = serde_json::from_str(contents.as_str()).unwrap();
diff --git a/src/configurator/components/draggable-strip.tsx b/src/configurator/components/draggable-strip.tsx
index b815372..5bb5a8a 100644
--- a/src/configurator/components/draggable-strip.tsx
+++ b/src/configurator/components/draggable-strip.tsx
@@ -43,21 +43,21 @@ export const DraggableStrip: FC<DraggableStripProp> = ({
   const handleMouseMoveRef = useRef<(ev: MouseEvent) => void>();
   const [boxTranslateX, setBoxTranslateX] = useState(0);
 
-  const ledItems = useMemo(
-    () =>
-      pixels.map((rgb, i) => (
-        <StyledPixel
-          key={i}
-          rgb={rgb}
-          css={css`
-            grid-column: ${(availableConfig.global_start_position ?? 0) + i + 1} / span 1;
-            grid-row-start: ${index + 1};
-            pointer-events: none;
-          `}
-        />
-      )),
-    [pixels, availableConfig],
-  );
+  const ledItems = useMemo(() => {
+    const step = config.global_start_position - config.global_end_position < 0 ? 1 : -1;
+    return pixels.map((rgb, i) => (
+      <StyledPixel
+        key={i}
+        rgb={rgb}
+        css={css`
+          grid-column: ${(availableConfig.global_start_position ?? 0) + i * step + 1} /
+            span 1;
+          grid-row-start: ${index + 1};
+          pointer-events: none;
+        `}
+      />
+    ));
+  }, [pixels, availableConfig]);
 
   const [placeholders, placeholderRefs]: [ReactNode[], RefObject<HTMLSpanElement>[]] =
     useMemo(
diff --git a/src/configurator/components/led-strip-editor.tsx b/src/configurator/components/led-strip-editor.tsx
index 2a88d06..b30e4e9 100644
--- a/src/configurator/components/led-strip-editor.tsx
+++ b/src/configurator/components/led-strip-editor.tsx
@@ -28,7 +28,14 @@ export const LedStripEditor: FC<LedStripEditorProps> = ({
 }) => {
   const addLed = useCallback(() => {
     if (config) {
-      onChange?.({ ...config, global_end_position: config.global_end_position + 1 });
+      if (config.global_start_position <= config.global_end_position) {
+        onChange?.({ ...config, global_end_position: config.global_end_position + 1 });
+      } else {
+        onChange?.({
+          ...config,
+          global_start_position: config.global_start_position + 1,
+        });
+      }
     } else {
       onChange?.(new LedStripConfig(0, 0, 1));
     }
@@ -36,10 +43,29 @@ export const LedStripEditor: FC<LedStripEditorProps> = ({
   const removeLed = useCallback(() => {
     if (!config) {
       onChange?.(null);
+    } else if (Math.abs(config.global_start_position - config.global_end_position) <= 1) {
+      onChange?.(null);
     } else {
-      onChange?.({ ...config, global_end_position: config.global_end_position - 1 });
+      if (config.global_start_position <= config.global_end_position) {
+        onChange?.({ ...config, global_end_position: config.global_end_position - 1 });
+      } else {
+        onChange?.({
+          ...config,
+          global_start_position: config.global_start_position - 1,
+        });
+      }
     }
   }, [config, onChange]);
+  const reverse = useCallback(() => {
+    if (!config) {
+      return;
+    }
+    onChange?.({
+      ...config,
+      global_start_position: config.global_end_position,
+      global_end_position: config.global_start_position,
+    });
+  }, [config, onChange]);
 
   return (
     <StyledContainer {...htmlAttrs}>
@@ -49,7 +75,7 @@ export const LedStripEditor: FC<LedStripEditorProps> = ({
       <StyledButton title="Remove LED" onClick={removeLed}>
         <FontAwesomeIcon icon={faMinus} />
       </StyledButton>
-      <StyledButton title="Reverse">
+      <StyledButton title="Reverse" onClick={reverse}>
         <FontAwesomeIcon icon={faLeftRight} />
       </StyledButton>
       {`s: ${config?.global_start_position ?? 'x'}, e: ${