Select colour, type and line width (Optional)

It is possible to select in advance the color, type and line width of the contour lines, as well as specify a cycling sequence for them. So, you can achieve for example that lines with heights 10, 20, 30, etc. have a defined line type and color, and that those of levels 15, 25, 35, etc. have another.

Fig. 36
The coloured button invokes the corresponding menu, which is standard in Windows. The two to the right increase or decrease the line width. The current combination of style, colour and line width is presented in the button below, which changes when you change the other options. If you press it, you will cycle through the available line styles.
In the large button to the right an illustration of the current design is presented. In order to add or delete a new combination of colour, type and line width you should either press one or the other of those buttons with the black triangle. Notice that any combination will be used in a cyclic way: the level associated to the value indicated in the From box will have the first combination, and the other levels will use the following style.

With this procedure you can specify, for example, a first line of colour red and four of color black. If in the From box you have a value of 10, and in the Incr box a value of 2, thus the level 10 will be a red line, and the values at levels 12, 14, 16 and 18 will be black. The value of level 20 will have again red colour, and those of levels 22, 24, 26 and 28 will be black, and so on until exhausting the displayed levels.

Fig. 37

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