On the right side of the window there is a layer list in which all the currently opened layers are displayed. User may hide the layers in the map by clicking any of the checkboxes in the list.
Clicking the „+“ sign will show a dialog by which a new layer can be added to the geodatabase. Clicking the „-“ sign will delete the selected layer. Clicking the „Refresh“ sign will add non-existent default layers to the geodatabase (the default layers accommodate the element buttons in 19.2 Toolbar )