- the notebook is automatically collapsed when there are no objects in the collection and it is showed when adding an object

- added new options in Edit -> Preferences -> General -> App Preferences to control if the Notebook is showed at startup and if the notebook is closed when there are no objects in the collection and showed when the collection has objects.

FlatCAMGUI.py

@@ -273,6 +273,8 @@ class FlatCAMGUI(QtWidgets.QMainWindow):
             QtGui.QIcon('share/fscreen32.png'), "&Toggle FullScreen\tALT+F10")
         self.menuview_toggle_parea = self.menuview.addAction(
             QtGui.QIcon('share/plot32.png'), "&Toggle Plot Area\tCTRL+F10")
+        self.menuview_toggle_notebook = self.menuview.addAction(
+            QtGui.QIcon('share/notebook32.png'), "&Toggle Project/Sel/Tool\t`")
 
         self.menuview.addSeparator()
         self.menuview_toggle_grid = self.menuview.addAction(QtGui.QIcon('share/grid32.png'), "&Toggle Grid Snap\tG")
@@ -2819,18 +2821,31 @@ class GeneralAppPrefGroupUI(OptionsGroupUI):
         self.mselect_radio = RadioSet([{'label': 'CTRL', 'value': 'Control'},
                                      {'label': 'SHIFT', 'value': 'Shift'}])
 
-        # # Mouse panning with "Space" key, CB
-        # self.pan_with_space_label = QtWidgets.QLabel('Pan w/ Space:')
-        # self.pan_with_space_label.setToolTip(
-        #     "Check this box if you want to pan when mouse is moved,\n"
-        #     "and key 'Space' is pressed."
-        # )
-        # self.pan_with_space_cb = FCCheckBox(label='')
-        # self.pan_with_space_cb.setToolTip(
-        #     "Check this box if you want to pan when mouse is moved,\n"
-        #     "and key 'Space' is pressed."
-        # )
+        # Project at StartUp CB
+        self.project_startup_label = QtWidgets.QLabel('Project at StartUp:')
+        self.project_startup_label.setToolTip(
+            "Check this box if you want the project/selected/tool tab area to\n"
+            "to be shown automatically at startup."
+        )
+        self.project_startup_cb = FCCheckBox(label='')
+        self.project_startup_cb.setToolTip(
+            "Check this box if you want the project/selected/tool tab area to\n"
+            "to be shown automatically at startup."
+        )
 
+        # Project autohide CB
+        self.project_autohide_label = QtWidgets.QLabel('Project AutoHide:')
+        self.project_autohide_label.setToolTip(
+            "Check this box if you want the project/selected/tool tab area to\n"
+            "hide automatically when there are no objects loaded and\n"
+            "to show whenever a new object is created."
+        )
+        self.project_autohide_cb = FCCheckBox(label='')
+        self.project_autohide_cb.setToolTip(
+            "Check this box if you want the project/selected/tool tab area to\n"
+            "hide automatically when there are no objects loaded and\n"
+            "to show whenever a new object is created."
+        )
 
         # Just to add empty rows
         self.spacelabel = QtWidgets.QLabel('')
@@ -2847,7 +2862,9 @@ class GeneralAppPrefGroupUI(OptionsGroupUI):
 
         self.form_box.addRow(self.panbuttonlabel, self.pan_button_radio)
         self.form_box.addRow(self.mselectlabel, self.mselect_radio)
-        # self.form_box.addRow(self.pan_with_space_label, self.pan_with_space_cb)
+        self.form_box.addRow(self.project_startup_label, self.project_startup_cb)
+        self.form_box.addRow(self.project_autohide_label, self.project_autohide_cb)
+
         self.form_box.addRow(self.spacelabel, self.spacelabel)
 
         # Add the QFormLayout that holds the Application general defaults