---
title: "Configuring the Trend Axes"
canonical: "https://networkconnect.docs.rubiconwater.com/space/NC/2503901737/Configuring%20the%20Trend%20Axes"
format: markdown
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> Macro (toc)

# Configure the Vertical Axes

Use the **Y Axis** tab of the Settings panel to configure the vertical axes for the tag trend lines.

By default, the chart will show a vertical axis for each unit of measurement used by the tags on the chart and the range of the axes will cover the range of values found in the tag(s) using that unit. If you prefer to have separate axes for each tag you can [Add a New Y-Axis](https://rubiconwater.atlassian.net/wiki/spaces/NC/pages/2211872899).

> ℹ️ **Example**
> ℹ️ 
> ℹ️ For example, if you have the following tags on your chart:
> ℹ️ 
> ℹ️ - Current Flow in m/s
> ℹ️ - Upstream level in m
> ℹ️ - Downstream level in m
> ℹ️ 
> ℹ️ Then by default you will have two vertical axes:
> ℹ️ 
> ℹ️ - m/s (used by the current flow tag)
> ℹ️ - m (used by the two water level tags)

## Change the Y-axis settings

1. On the Y Axis tab of the Settings menu select the axis that you want to configure.
2. Edit the label field if you want to change the axis label
3. Use the Show/Hide toggle to show or hide the axis
4. Set the way that the axis range is determined:
  - Leave the range set to *Automatic* to automatically adjust to the range of values currently stored for the tags using this axis.
  - Turn off the *Automatic* setting to set the range manually, Then enter the minimum and maximum values for the axis. For example, you might do this if you want to ensure that the axis starts at zero, or if you want to restrict the range of the axis to ignore outliers.
  - Optionally set an offset (positive or negative) to shift the trend line up or down.

## Add a new Y-axis

You can add a new Y axis to the chart and configure a tag to use that axis.

> ℹ️ **Example**
> ℹ️ 
> ℹ️ You might do this if you have two tags using the same axis (such as upstream and downstream water level tags) and you want to use separate axes for each tag.

> ℹ️ **Caution**
> ℹ️ 
> ℹ️ You can't specify the units to use on an axis or convert tag data to use different units. The axis just uses the range of values assigned to the tag (or specified by you) regardless of the apparent units of the axis. 
> ℹ️ 
> ℹ️ Take care not to use the axis for tags that are measured in different units.

1. On the **Y Axis** tab of the Settings panel tap the **Add** button at the bottom of the screen to add a new Y axis.
2. Give the axis a label. Adjust the range and visibility settings and click **Save** to save your settings.
3. On the Tags tab, select the tag that you want to use this axis and select the new axis in the Y Axis drop-down. Click **Save** to save your settings.

## Delete an Axis

1. On the Tags tab of the Settings menu, check to see if any tags are associated with the axis and remove the associations. You cannot delete an axis that is being used by a tag.
2. On the Y Axis tab of the Settings menu select the axis that you want to delete and tap the **Delete** button.

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