显示四组实心图形

1. 按a—z四组图形元素由该符号组成，按其它键图形元素用？组成。

2. 按1—4键手动切换显示四个图形之一。

-Four groups showed a solid graphics. A-z according to four groups of symbols by the graphic elements of the graphic elements in accordance with other keys? Composition. 2. By manually switching keys 1-4 shows one of the four graphics.