The editor will be active after you select the "Modify Shared Web Part" option from the web part menu. The toolbar is set to show when you click inside the content area. You can change this behavior by modifying the editor's configuration file (http://www.telerik.com/help/radeditormoss/SetPropertiesViaConfigFile.html
). Open the configuration file and remove the line:
After that the toolbar will always be visible when the editor is active.
After you have finished adding content, you need to click the "OK" or "Apply" buttons in the web part menu at the right of the page. If the menu is not visible you might need to scroll right to see it. I have attached a screenshot for your convenience.
the Telerik team