---
title: "Migrated icon sets (legacy) | Guides | Map design"
description: "What are migrated icon sets and how to work with them."
---

# Migrated icon sets (legacy)

Have you uploaded any icons before we introduced [icon sets management](https://docs.maptiler.com/guides/map-design/icons/manage-icon-sets/)? If so, your icons are now included in **migrated (legacy) sets**.

![Migrated icon sets](../img/migrated-sets.webp)

-   For each map where you’d uploaded one or more custom icons, there’s now a migrated set.
-   The migrated set contains your custom icons plus all icons from the default catalog set.
-   Names of migrated sets consist of a mix of alphanumeric characters. To recognize your migrated sets more easily, check the section **Maps using this set**.

Tip

Icons in a set are displayed in alphabetical order, so your custom icons might not be instantly visible – depending on their filename, you may need to scroll through the migrated set to find them.

For technical reasons, migrated sets as such are **not editable**. You can, however, [replace an individual icon](https://docs.maptiler.com/guides/map-design/icons/#replace-icon) in a specific map with a new one.