By default, Trend objects display traces related to all configured pens. However, it is possible to temporarily hide one or more paths to improve the readability of the chart.
The visibility status of each pen is indicated in the legend by a check mark to the left of the pen line. Visible feathers are marked with the ΓΌ symbol.

To view or hide a pen, simply click on the symbol above. Each click reverses the visibility status of the pen.

It is possible to show or hide a pen even from appropriately configured animations or keyboard events: see "Trend control using Animations or Keyboard Events".