# Page Not Found

The URL `portal/en/kb/articles/using-frame-comparison` does not exist. This page may have been moved, renamed, or deleted.

## Suggested Pages

You may be looking for one of the following:
- [Using frame comparison](https://docs.velogicfit.com/velogic-web-tools/using-frame-comparison.md)
- [Frame Comparison - Bar Curve X and Bar Top Y for Road Bikes](https://docs.velogicfit.com/velogic-web-tools/frame-comparison-bar-curve.md)
- [Changing your credit card](https://docs.velogicfit.com/general/changing-credit-card.md)
- [Troubleshooting marker detection](https://docs.velogicfit.com/section-02-using-velogic-studio/troubleshooting-marker-detection.md)
- [Taking bike measurements](https://docs.velogicfit.com/section-03-calibration-and-measurement/taking-bike-measurements.md)

## How to find the correct page

If the exact page cannot be found, you can still retrieve the information using the documentation query interface.

### Option 1 — Ask a question (recommended)

Perform an HTTP GET request on the documentation index with the `ask` parameter:

```
GET https://docs.velogicfit.com/velogic-web-tools/using-frame-comparison.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

### Option 2 — Browse the documentation index

Full index: https://docs.velogicfit.com/sitemap.md

Use this to discover valid page paths or navigate the documentation structure.

### Option 3 — Retrieve the full documentation corpus

Full export: https://docs.velogicfit.com/llms-full.txt

Use this to access all content at once and perform your own parsing or retrieval. It will be more expensive.

## Tips for requesting documentation

Prefer `.md` URLs for structured content, append `.md` to URLs (e.g., `/velogic-web-tools/using-frame-comparison.md`).

You may also use `Accept: text/markdown` header for content negotiation.