The Workflow Designer user interface consists of three primary parts.
Panes
Panes are windows divided into sections. The Workflow Designer contains several separate panes, each of which performs a different function. You can configure the pane layout to meet your needs. More information.
Main Menu
The main menu, located in the top left corner of the user interface, contains a series of nested menus. It provides access to a wide variety of functions and settings. 
Show me the main menu.
Toolbar
The toolbar enables you to quickly perform basic operations without having to navigate through nested main menu items. It provides access to a wide variety of commands, such as saving a workflow definition, deleting the currently selected item, zooming in and out, and opening and closing panes. More information.
Context Menus
Right-clicking in the blank space of the Designer Pane will open the context menu, allowing you to customize the content displayed in the Designer Pane
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