diff --git a/src/ui/userInterface.py b/src/ui/userInterface.py
index 2faa3d5..6f35b72 100644
--- a/src/ui/userInterface.py
+++ b/src/ui/userInterface.py
@@ -178,6 +178,7 @@ class Ui(Ui_Semesterapparat):
         self.line_3.hide()
         self.avail_status.hide()
         self.chkbx_show_del_media.hide()
+        self.automation_add_selected_books.hide()
         # self.btn_del_select_apparats.setEnabled(False)
 
         self.tabWidget.currentChanged.connect(self.tabW1_changed)
@@ -589,6 +590,8 @@ class Ui(Ui_Semesterapparat):
     def load_app_data(self, app_id=None):
         self.cancel_active_selection.setEnabled(True)
         self.add_medium.setEnabled(True)
+        for child in self.app_group_box.findChildren(QtWidgets.QToolButton):
+            child.show()
         if isinstance(app_id, str):
             # double click the tableWidget_apparate row with the given app_id
             row, column = self.get_index_of_value(self.tableWidget_apparate, app_id)
@@ -633,6 +636,8 @@ class Ui(Ui_Semesterapparat):
     def btn_create_new_apparat(self):
         global valid_input
         self.steps.show()
+        for child in self.app_group_box.findChildren(QtWidgets.QToolButton):
+            child.show()
         # *create a new apparat
         self.btn_apparat_save.show() if self.btn_apparat_save.isHidden() else None
         # clear dokumemt_list
@@ -803,6 +808,8 @@ class Ui(Ui_Semesterapparat):
 
         for child in self.app_group_box.findChildren(QtWidgets.QLineEdit):
             child.clear()
+        for child in self.app_group_box.findChildren(QtWidgets.QToolButton):
+            child.hide()
         self.validate_app_fach()
         self.validate_app_name()
         self.validate_prof_mail()
@@ -1319,6 +1326,8 @@ class Ui(Ui_Semesterapparat):
         row = self.tableWidget_apparate.rowAt(position.y())
         column = self.tableWidget_apparate.columnAt(position.x())
         pos = (str(row), str(column))
+        if len(self.tableWidget_apparate.selectedItems()) == 0:
+            return
         pid = self.__get_table_data_field(self.tableWidget_apparate, pos[0], 2)
         app_id = self.__get_table_data_field(self.tableWidget_apparate, pos[0], 0)
         ic(pos, pid)