> For the complete documentation index, see [llms.txt](https://docs.moasure.com/en/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.moasure.com/en/moasure-lx1/your-moasure-lx1-device/reference-point-left-right.md).
# Reference Point (Left / Right)
Understand the Reference Point (Left / Right)
Moasure LX1 has one active **Reference Point**, which can be switched between the **top-left** and **top-right outer point** of the device.
The Reference Point defines the exact position recorded each time LX1 confirms a **pause point**. It ensures the floor plan geometry aligns correctly with the physical surfaces you measure.
By default, the Reference Point is switched to the **left** when you turn on the device.
Press the Arrow Button while moving between pause points
### What the Reference Point Does
When Moasure LX1 captures a point, the measurement is anchored from the **active Reference Point**, not the centre of the device.
This ensures features such as doors, windows, wardrobes / closets and stairs are positioned accurately within the floor plan.
The Reference Point applies whenever LX1 records a pause point during measurement.
***
### When to Change the Reference Point
In most room measurements, the Reference Point can remain on the same side throughout. For example, when placing LX1 against the middle of a wall, either side can be active because both Reference Point positions are on the same wall plane.
The Reference Point becomes more important when measuring from a specific edge, such as the edge of a door, window, stair opening or wardrobe / closet. In these situations, you may need to switch the Reference Point so the active side lines up with the edge you want to capture.
Switching the Reference Point becomes important when you need a particular side of LX1 to line up with the edge you are measuring.
This is particularly useful when measuring **edge-to-edge**, for example:
* **Doors** – switching the Reference Point to line up with each outer edge of the door or frame
* **Windows** – switching the Reference Point to line up with each window edge
* **Stair openings** – switching the Reference Point to line up with the edges of the opening
* **Wardrobes / Closets** – switching the Reference Point where necessary to line up with the edges of the opening
{% hint style="info" %}
When measuring **jamb-to-jamb** or **reveal-to-reveal**, you don't need to switch the Reference Point.
{% endhint %}
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### When Not to Change the Reference Point
During normal wall measuring, the Reference Point usually does **not** need to be changed.
For example:
* Measuring along walls
* Moving between wall planes
* Capturing standard wall positions
In these situations, the Reference Point can remain on the same side throughout the room.
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### How to Change the Reference Point
By default, the Reference Point is switched to the **left** when facing the buttons and LEDs.
To switch the Reference Point:
1. Press the **↔ arrow button (top button)** while moving between pause points
2. The LEDs show whether the Reference Point is currently active on the **left or right side**
Switching the Reference Point is instant, so you can press the arrow button **while moving between placements** to select the side you need before the next point is captured.
***
### Best Practice
Before capturing a feature edge-to-edge, check which side the **Reference Point** is currently active on.
If necessary, use the arrow button while moving to switch it to the side of LX1 that will line up with the edge you're measuring.
During normal wall measurement, you can usually leave the Reference Point on the same side.
For jamb-to-jamb doors or reveal-to-reveal windows, there is no need to switch the Reference Point.
***
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