> For the complete documentation index, see [llms.txt](https://docs.growthfactor.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.growthfactor.ai/faqs.md).
# FAQs
Where can I learn more about Retail Expansion?
Try visiting our [Retail Expansion Knowledge Base!](https://www.growthfactor.ai/resources/retail-location-analysis-guide-2025-trade-area-analysis-best-practices)
## Layers
Why can't I see certain layers on my map?
If a layer isn't appearing in your Map Layers panel, it may be turned off for your legend. Click **Manage Layers** at the bottom of the panel to open the **Manage Layers** dialog, where you can enable any hidden layers.
See [Map Layers](/manage/map-layers.md).
My teammate opened my study and the layers I added are gone. Why?
The layers you add to a study are remembered in your browser, not saved to the study. A teammate opening the same study sees the default layers. You'll see the defaults again too if you open the study in a different browser.
I deleted a custom layer. Did that affect other maps?
Yes. Deleting a layer from **My Layers** removes it everywhere it was used. Removing a layer from a single study is different — that only takes it off that study's map and leaves the layer intact.
## Studies
How do I delete a study?
You archive it rather than delete it. Choose **Archive** from the study's **⋯** menu. Archived studies move to the **Archived** tab and open read-only. **Unarchive** brings one back. There is no permanent delete.
See [Studies Overview](/study/overview.md).
Can I compare two sites if they have different trade zones?
Not meaningfully. A 10-minute drive time and a 1-mile ring cover different ground, so their demographics and business counts aren't comparable. Give candidates the same trade zone method before comparing them.
See [Trade Zones](/data-and-analytics/trade-zones.md).
## Data
Why does my foot traffic trade zone show a smaller population than a ring?
A foot traffic zone only covers where visitors actually come from, so it usually encloses less area than a ring drawn at a similar scale. The numbers are lower but more precise — they describe people who visit, not everyone who lives nearby.
## Files
Why can't I delete a file myself?
File deletion goes through the GrowthFactor team. Choosing delete opens **Request File Deletion** and submits a request for review, so the file stays available until it's processed. For anything time-sensitive, email .
See [My Files](/manage/my-files.md).
---
# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.
## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.
Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:
```
GET https://docs.growthfactor.ai/faqs.md?ask=&goal=
```
`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.