The Process Analyst pens use gridlines as a visual guide to help an Operator determine the value of trends. Major gridlines are solid lines; minor gridlines are dashed lines. Analog pens have vertical and horizontal gridlines; alarm and digital pens only have vertical gridlines. The display of gridlines changes dynamically according to the selected time span.
You can configure vertical gridlines at run time for every pen type; you can configure horizontal gridlines for analog pens. For details, see Configuring pen gridlines.