Enabling Navigator Panel in the Procedure Editor and SQL Editor Windows (4289242)

How can the Navigator panel be re-opened in the Procedure Editor Window as well as the SQL Editor Window of TOAD if accidentally closed?

For Toad for Oracle 8.6.1 and prior versions:
Procedure Editor Window:
1) Right-click on the Editor Pane
2) Select "Procedure Editor Desktop"
3) Check "Navigator

SQL Editor Window:
1) Right-click on the Editor Pane
2) Select "SQL Editor Desktop"
3) Check "Navigator

For Toad for Oracle  9.0 and newer versions:
1) Right-click on the Editor Pane
2) Select "Desktop Panels"
3) Check "Navigator

To choose where you want the window docked:
1) Right-click on the Editor Pane
2) Select "Desktop Panels" | "Configure Desktop Layout"