# Trend is missing data when scrolling

## Problem

Data outside of the visible trend chart area is lost. When you scroll backward or forward, data is missing.

## Cause

The trend object stores a limited number of extra data points in addition to those shown. You can configure the amount of extra data stored in a buffer.

## Solution

On the Display tab, configure the Buffer for extra data option to hold more records per pen.

## See also

Options on the Display tab of the Trend Object Properties dialog box

Keywords: troubleshoot, trend