diff --git a/src/btn.ts b/src/btn.ts
index 1b42c0c..e55f5a7 100644
--- a/src/btn.ts
+++ b/src/btn.ts
@@ -87,6 +87,10 @@ export namespace BtnAction {
   export const PROCESSING_TEXT = 'Processing…'
   export const ERROR_TEXT = '❌Download Failed!'
 
+  const deprecationNotice = (btnName: string): string => {
+    return `DEPRECATED! (may still work)\n\nUse \`${btnName}\` inside \`Individual Parts\` instead.`
+  }
+
   type Promisable<T> = T | Promise<T>
   type UrlInput = Promisable<string> | (() => Promisable<string>)
 
@@ -160,4 +164,12 @@ export namespace BtnAction {
     }
   }
 
+  export const deprecate = (action: BtnAction): BtnAction => {
+    return (name, btn, setText) => {
+      alert(deprecationNotice(name))
+      // eslint-disable-next-line @typescript-eslint/no-unsafe-return
+      return action(name, btn, setText)
+    }
+  }
+
 }
diff --git a/src/main.ts b/src/main.ts
index 60e09cc..cf991d5 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -27,7 +27,9 @@ const main = (): void => {
 
   btnList.add({
     name: 'Download PDF',
-    action: BtnAction.process(downloadPDF),
+    action: BtnAction.deprecate(
+      BtnAction.process(downloadPDF),
+    ),
   })
 
   btnList.add({
@@ -42,7 +44,9 @@ const main = (): void => {
 
   btnList.add({
     name: 'Download MIDI',
-    action: BtnAction.download(() => getFileUrl('midi'), `${filename}.mid`),
+    action: BtnAction.deprecate(
+      BtnAction.download(() => getFileUrl('midi'), `${filename}.mid`),
+    ),
   })
 
   btnList.add({