Click each color in the palette to choose it as the active color for drawing.
You may use your mouse's left and right button to work at the same time.
Left click a color, it will be set as active color for left button of your mouse.
Right click a color, it will be set as active color for right button of your mouse.
Double click each color, the color dialog box will be activated and the clicked color
will be brought in as the default value.
Double click the active color of left and right mouse button, the color dialog box will
be actived, and the clicked color will be brought in as the default value.
Use the color picker from the toolbox to pick a color from the grid into the active color area.
You may use left or right button of your mouse to pick the color for left or right mouse.
