Three visualization modes can be used:

They correspond to color, width or color + width modes:

Colors can be edited as follows:

Preset inspired by Color Brewer 2 can be used.

You can edit the color scale:

• you can move the cursors of each color level,
• with a right click, delete a color level,
• with a double click, add a new level.

The other colors can be edited (left click on them).