The options display on the left of the toolbar is a combination of a
combo-box as well as plus and minus adjusting buttons. Pressing the buttons will
change the currently displayed option.

The value of the currently displayed option can be altered by clicking on the plus and minus buttons. To change a new option or to just look at the current value of all the options just drop down the combo-box and click on the value to be changed. All the values are saved between IconPainter sessions so it is always wise to check such values as transparency and line width when creating a new icon. Beginning a new icon will not reset the values. Here are some explanations of some of the options.

IconPainter implements anti-aliasing by making the assumption that the line is being drawn on the background color. For the most part this shouldn't cause problems but it may detract from the quality of the lines in some situations.
Also see transparency and color gradient shading.
