Options on the X-Axis tab of the Trend Object Properties dialog box

Together, these two options determine the starting date and starting time on the left edge of the chart. As the chart scrolls with new data, it updates with the latest data for the specified time span. The start date and start time serve only as starting points on the chart. The start date must fall between 1/1/1992 and 12/31/2037.

To select a date from the calendar, click the

Down Arrow

beside the

Start date

box.

To select a time, click the

Up

or

Down

arrow beside the

Start time

box.

Start date

and

Start time

are disabled when scrolling is allowed. To enable

Start date

and

Start time

, clear the

Allow scrolling

check box on the

Display

tab.

Type a time and then click a time unit to specify the amount of data the trend chart displays at runtime. For a standard line chart, the time span controls the chart's horizontal scale.

For an XY plot, the

Min

and

Max

properties configured on the

Pens

tab of the selected pen control the horizontal scale, and the time span controls the number of data points plotted.

When configured through the

X-Axis

tab, the time span does not have a specific limit. The only limitation is that the time span cannot be so large that the start date plus the time span is later than 12/31/2037 when not scrolling. Also, the current date minus the time span cannot be earlier than 1/1/1992 when scrolling.

Specifies whether an x-axis label appears at the bottom of the chart.

For a standard line chart, the labels show the start and end times. For an XY plot, the labels show the minimum and maximum value range of the pen selected as the x-axis. If there is room, intermediate values are shown as well.

Select this check box to show vertical grid lines on the chart.

Specifies how many vertical grid ines to show on the chart.

Available values are 0-30.

Specifies how many minor vertical grid lines to show on the chart. These lines appear between the major grid lines and do not have axis values shown.

Available values are 0-10.

Specifies the color of the vertical grid lines.