> For the complete documentation index, see [llms.txt](https://docs.flatredball.com/gum/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.flatredball.com/gum/gum-tool/gum-elements/general-properties/x-origin.md).
# X Origin
## Introduction
The `X Origin` variable controls the point which an object is positioned by. By default the `X Origin` is `Left`. `X Origin` is shown visually as a white "X" in the editor.
ColoredRectangle with an X Origin of Left
## Left
The following image shows a [ColoredRectangle](/gum/gum-tool/gum-elements/coloredrectangle.md) with its `X Origin` set to `Left`:
## Center
The following image shows a ColoredRectangle with its `X Origin` set to `Center`:
## Right
The following image shows a ColoredRectangle with its `X Origin` set to `Right`:
## X Origin in a Left to Right Stack
A child in a [Left to Right Stack](/gum/gum-tool/gum-elements/container/children-layout.md#left-to-right-stack) which is not the first child ignores its `X Origin`, and the stack positions it as if its `X Origin` were `Left`. This keeps it from overlapping its previous sibling. The first child in the stack uses its `X Origin` normally, and `X Origin` works normally for every child in a `Top to Bottom Stack`.
{% hint style="warning" %}
**Breaking change in November 2026:** Before this version, `X Origin` applied to every child in a `Left to Right Stack`, so a `Center` or `Right` origin moved a child back over its previous sibling. Available in November 2026, or now if building Gum from source. For more information see [Migrating to 2026 November](/gum/gum-tool/upgrading/migrating-to-2026-november.md).
{% endhint %}
---
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