1. Make a group plot with one of the data more points and one with less points.

2. Open Plot Details dialog, go to Display tab of plot level, and set Data Point Display Control as Smart Skip(Total Points kept).

3. Set Smart Skip Method as Data Distance Threshold and click OK.

==> The skip point setting only applies to the first plot, not the second. It happens only for this particular settings and some particular plot.

4. Select the layer, try to resize the layer height taller or shorter.

==> skip point sometimes took effect, sometimes not.