# Trace Path Options

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Learn more about *Trace Path* in our [Path Types](https://docs.moasure.com/en/moasure-app/understand-path-types) guide.
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### Flight Points Resolution

Flight points make up the freeform lines when using Trace Line Path – this setting determines the distance between points captured when the device is ‘flying’ between pause points.

You can choose from the following options:

* Metric: 0.05m, 0.10m, 0.20m, or 0.30m
* Imperial: 0.20ft, 0.40ft, 0.70ft or 1.00ft

By default, 0.10m / 0.40ft is selected.

Lower values capture more detail, while higher values create a more simplified path.

### Smooth Trace Curves

To enable or disable Smooth Trace Curves:

1. Open Settings by tapping the **cog** icon in the top-right corner.
2. Tap **Measuring Options**.
3. Tap **Smooth Trace Curves** under **Trace Path Options**.
4. Select **Yes** to enable or **No** to disable smooth Bezier curves.
5. Tap on the **back arrow** in the top-left corner until you return to the canvas.

### Trace Path Elevation

In app version 3.0 or newer, Trace Path Elevation provides two options for handling height changes when using the Trace Line path type.

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Changes to the Trace Path Elevation setting only apply to new measurements.
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#### To change this setting:

1. Open **Settings** by tapping the cog icon.
2. Tap **Measuring Options**.
3. Under **Trace Path Options**, tap **Trace Path Elevation**.
4. Select either **Linear Height Smoothing** or **True Height Trajectory**.
5. Tap **Save**.
6. Tap on the **back arrow** in the top-left corner until you return to the canvas.

<figure><img src="https://3108400965-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FH1SckI7Noi5Ipj4x33R7%2Fuploads%2FFcwYEldem5phcaiPAUu1%2FPhone%20Template%20for%20User%20Guide%20(1920%20x%201080%20px)%20(15).gif?alt=media&#x26;token=3b62c3ae-ba73-4555-b3b6-bf5ef5e61380" alt="" width="375"><figcaption></figcaption></figure>

#### Follow these steps to toggle Trace Path Elevation from the canvas:

1. Tap on **File**, **Open** and open a measurement.
2. Choose your view from 2D or 3D cube.
3. Tap **Edit**.
4. Scroll to Smooth Z / Actual Z.
5. Tap to switch between **Smooth Z** and **Actual Z**:
   1. Smooth Z (Linear Height Smoothing): tap this to flatten minor obstacles like plants or handrails, offering a smoother representation of the path.
   2. Actual Z (True Height Trajectory): tap this to view the unfiltered, precise elevation changes, giving you an accurate representation of the terrain as it was measured.

<figure><img src="https://3108400965-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FH1SckI7Noi5Ipj4x33R7%2Fuploads%2Fcgz358luXXVkxhRj8syT%2FPhone%20Template%20for%20User%20Guide%20(1920%20x%201080%20px)%20(14).gif?alt=media&#x26;token=fc12f6fe-7a54-4c04-9159-2a99ba515684" alt="" width="375"><figcaption></figcaption></figure>

### Understanding Elevation Options

#### Linear Height Smoothing

This captures height at pause points, ignoring fluctuations in between.

You may want to avoid capturing all the elevation fluctuations that occur when lifting the device (the true flight path trajectory). Linear Height Smoothing applies linear interpolation between pause points, providing a more streamlined representation of vertical changes between points, resulting in a smooth elevation curve.

#### True Height Trajectory&#x20;

This captures the actual height trajectory of the device between – and at – pause points.

True Height Trajectory measures vertical movements both between and at pause points, capturing the device’s true height trajectory. Use this option when you need to trace not only a shape’s outline, but also its elevation during movement. If you don’t want to capture elevation changes between pauses, use Linear Height Smoothing instead.