diff --git a/README.md b/README.md
index 771e9bc..a7e3c81 100644
--- a/README.md
+++ b/README.md
@@ -33,6 +33,16 @@ It was forked from Calckey Firefish (itself a fork of Misskey) in mid-2023, to f
 * YunoHost Store: <https://apps.yunohost.org/app/iceshrimp>
 * Report a bug: <https://github.com/YunoHost-Apps/iceshrimp_ynh/issues>
 
+## Customising assets and locale
+
+* To add custom CSS for all users, edit `/var/www/iceshrimp/custom/assets/instance.css`.
+* To add static assets (such as images for the splash screen), place them in the `/var/www/iceshrimp/custom/assets/` directory. They'll then be available on <https://example.com/static-assets/filename.ext>.
+* To add custom locales, place them in the `/var/www/iceshrimp/custom/locales/` directory. If you name your custom locale the same as an existing locale, it will overwrite it. If you give it a unique name, it will be added to the list. Also make sure that the first part of the filename matches the locale you're basing it on. (Example: en-FOO.yml)
+* To add custom error images, place them in the `/var/www/iceshrimp/custom/assets/badges` directory, replacing the files already there.
+* To add custom sounds, place only mp3 files in the `/var/www/iceshrimp/custom/assets/sounds` directory.
+* To update custom assets without rebuilding, just run `yarn run gulp`.
+  * If a `gulp not found` error is received, run `yarn global add gulp-cli` then `yarn install` in `/var/www/iceshrimp` and try `yarn run gulp` again.
+
 ## Developer info
 
 Please send your pull request to the [testing branch](https://github.com/YunoHost-Apps/iceshrimp_ynh/tree/testing).
@@ -45,4 +55,4 @@ or
 sudo yunohost app upgrade iceshrimp -u https://github.com/YunoHost-Apps/iceshrimp_ynh/tree/testing --debug
 ```
 
-**More info regarding app packaging:** <https://yunohost.org/packaging_apps>
\ No newline at end of file
+**More info regarding app packaging:** <https://yunohost.org/packaging_apps>