# PERT Help

PERT provides tools, handles, and commands to manipulate a PERT diagram.

A task is shown as a box with a line for the task's name, a line for the task's duration, and a line for the task's earliest end time. Only the task's name and its duration are editable. The end time is calculated automatically by PERT.

Circular dependencies are shown in red.

### Tools

The tool palette on the left offers several tools that either create new figures or manipulate existing ones.

| selects, moves or resizes a figure; the shift-key toggles the selection. Dragging the selection tool in the background selects the figures within the dragged rectangle.
| creates a new task
| creates a new or edits an existing text figure
| creates or adjusts connections between figures. A connection is split into segments by dragging a point on the connection. To join two segments click the end point of a segment
| creates a line figure

### Handles

When selected figures offer different handles to manipulate them.

- the blue circle handle is a connection handle. It allows to create connections between figures.
- the framed red handles are null handles. They only show the selection status of a figure but don't support any manipulation.
- the green handles are shown on connections. They enable to reconnect them with another figure.
- the yellow handle enables to change the font size of a text figure or the size of the radius of a rounded rectangle.

### Commands

Commands are invoked from the button bar at the bottom (applet) or from the menu bar at the top (application).

The standard commands that are provided include, cut, copy, paste, duplicate, delete, group, ungroup, bring to front, and send to back.

### Attributes

Attributes, such as fill color, text color or arrow tip, can be changed through the attributes menu (stand-alone) or the pop up menues (applet).