> For the complete documentation index, see [llms.txt](https://1spatial.gitbook.io/fme-form-beginner/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://1spatial.gitbook.io/fme-form-beginner/transformer-usage/locating-transformers/transformer-gallery.md).
# Transformer Gallery
The transformer gallery window is the obvious place to start looking for transformers. There are a number of ways in which transformers here can be located.
## Transformer Categories
Transformer categories are a good starting point from which to explore the transformer list. Transformers are grouped in categories to help find a transformer relevant to the problem at hand.
Although all of them are important, the most commonly used transformers are found in these categories:
* **Attributes:** Operations for attribute/list management
* **Calculated Values:** Operations that return a calculated value
* **Filters and Joins:** Operations for dividing and merging data flows
* **Geometries:** Operations that create geometry or transform it to a different geometry type
* **Spatial Analysis:** Operations that return the result of a spatial analysis
* **Strings:** Operations that manipulate string contents, including dates
Simply click on the expand button to show all transformers within a particular category.
## Transformer Gallery Search
To perform a search in the transformer gallery, enter the search terms and either press the enter key or click the search icon (the binoculars icon).
The transformer gallery search searches in both name and description. Therefore a search term may be the exact name of a transformer, or it may be a general keyword referring to functionality in general:
Search terms can either be full or partial words and may consist of a number of keywords, including quote marks to enclose a single search reference:
---
# 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:
```
GET https://1spatial.gitbook.io/fme-form-beginner/transformer-usage/locating-transformers/transformer-gallery.md?ask=
```
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.
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.