The object palette is comprise of several columns of four (or less) buttons. The first button (when depressed) turns on the various objects. The second button (when selected with the mouse) lets you select the object to be colored (in conjunction with the Color Palette). This new color is reflected by the color of this button. The third button controls and displays the pen thickness for that particular object (the gray regions represent a 'nonsense' choice for that object and are inactive). The last button (on the very bottom) controls the pattern to be used by the pen when drawing the object. When selected, a small window appears and the user chooses the desired pen pattern.
If a MOL object is deleted, then those buttons are eliminated and the palette shrinks to just the right size.
**The 'Pref' buttons set a wide variety of options all at once**