Use this tool to draw
a straight line or a series of straight lines; with the option of adding arrow-heads. To change the width of the
lines you draw, use the width entry on the toolbox. Use the palette to
change colors. Click the start point then move the mouse and click to set the
lines. Right-click the end point to finish. Click and drag points to edit. Right-click
again to apply.
The level variable controls the size of decorations such as arrow-heads.
Use the anti-alias mode to enable or disable anti-aliasing. When anti-aliasing is enabled (default); all drawing is done at the sub-pixel level to give you the highest quality results.
Options
Simple line
This option draws a simple line with antialiased edges.
Single Arrow
This option draws a simple line with antialiased edges and one arrow-head.
Double Arrow
This option draws a simple line with antialiased edges and two arrow-heads.
Single Ball
This option draws a simple line with antialiased edges and one ball-end.
Double Ball
This option draws a simple line with antialiased edges and two ball-ends.
Single square
This option draws a simple line with antialiased edges and one square-end.
Double square
This option draws a simple line with antialiased edges and two square-ends.
Use this tool to draw
a straight line or a series of straight lines; with the option of adding arrow-heads. To change the width of the
lines you draw, use the width entry on the toolbox. Use the palette to
change colors. Click the start point then move the mouse and click to set the
lines. Right-click the end point to finish. Click and drag points to edit. Right-click
again to apply.
Simple line
Single Arrow
Double Arrow
Single Ball
Double Ball
Single square 
Double square