What is the significance of the T symbol in some of the colors on the color palette?
Windows recognises two types of color: solid colors which can be rendered exactly on a display or other output device (such as a printer) by a uniform collection of pixels (dots) of the same color, and non-solid dithered colors made by mixing different colored pixels to create an effect that appears to the human eye at a distance of a few inches or more to be the uniform color intended. For example, an area filled with alternating blue and yellow dots would appear green. While an area can be colored, or shaded, with any color, solid or dithered, Windows can display text only in solid colors. If Windows is asked to draw text in a dithered color, it will in fact draw it in the closest matching solid color available. VisiMap uses the ‘T’ symbol in its color palette to indicate to you which color samples are solid colors (and can therefore be used as text colors): if you apply one of these colors to a branch (by clicking the left mouse button over the color sample in the palette), then you
