RainPro has a pre-defined cycle of line-styles which are used in turn for each line that you draw. The default cycle is ‘Solid,Dashed,Dotted,DDash’. To reset the cycle:

ch.Set 'Lines' 'solid,dot,solid,dash'      © or
ch.Set 'Lines' 1 3 1 2                     © by number

If you are plotting a lot of lines on the same chart, ensure that the colour, marker and line-style cycles are of different lengths to give you the maximum number of permutations. You can easily make all lines solid (for example if you have a colour printer) by setting ‘Solid’ or ‘1’ as the line style.

The available line types are:

1. Solid
2. Dashed
3. Dotted
4. Dot-Dash
5. Dash-Dot-Dot
6. Invisible

You can change these (or add new types) if required. See Changing the Dashline Repeat for details.