Use this tool to draw single or joined freehand line segments. When you click the Pencil Tool button and move the cursor over an image frame, the cursor will take shape of a pencil. Press the left mouse button and drag the cursor to draw the desired line. If you want to constrain a segment to a straight line, click the left mouse button to anchor the starting point, hold down the SHIFT key and move the cursor, clicking the mouse button every time you want to set a new anchor point. If you want to constrain a segment to a vertical or horizontal line, press the left mouse button and hold down the CTRL key while dragging the cursor. When you draw with the Pencil Tool, the current draw color is applied. You can select the width of the line on the Palette Bar and watch the changes in the pen width sample. If you double-click the pen width sample, the Tool Settings dialog box will appear. To select the width of the line, indicate the desired value in pixels in the Width box.