CellDesigner consists of four areas as shown below: 
| Draw Area: | To draw a model. |
| List Area: | to display and edit the list of the components, functions c.of a model |
| Notes Area | To display and edit the notes of the component |
| Tree Area: | Displays all the list of the components in the tree structure. |
To change the area size:
• The size of the area can be changed by dragging the border lines.
• To maximize the area, click the triangle icons on the borders.
To Customiz e Tool bar:
• Each group of the icons can be detached from the Tool Bar.
• It can also move to the left side of the screen by dragging the handle to the left boundaries.
