change

src/app/tiny-mce/tiny-mce.page.scss

@@ -30,4 +30,20 @@
 
   #my-tinymce {
     height: 200% !important;
-  }
+  }
+
+
+editor {
+
+  height: 100% !important;
+
+}
+
+
+
+
+.tox-tinymce {
+
+  height: 100% !important;
+
+}

src/app/tiny-mce/tiny-mce.page.ts

@@ -26,6 +26,25 @@ export class TinyMCEPage implements OnInit {
   ) {
     this.Document = this.navParams.get('Document')
     this.content = this.navParams.get('content')
+
+
+    this.waitForTiny();
+  }
+
+  waitForTiny() {
+    const tiny: HTMLDivElement = document.querySelector('.tox-tinymce')
+
+    if(tiny) {
+      this.doneWaitForTiny(tiny)
+    } else {
+      setTimeout(() => {
+        this.waitForTiny()
+      }, 500)
+    }
+  }
+
+  doneWaitForTiny(tiny: HTMLDivElement) {
+    tiny.style.height = '100%'
   }
 
   ngOnInit() {