diff --git a/README.md b/README.md
index 90228a6..946457c 100644
--- a/README.md
+++ b/README.md
@@ -45,6 +45,12 @@ You can change build config in `config.json`
 - There is `--normal` option in `build.py` for common config, just like `JetBrains Mono` (with slashed zero)
 - For custom `font-patcher` args, `font-forge` (and maybe `python3-fontforge` as well) is needed
 
+#### Font Feature Freeze Options
+
+- `enable`: Move ligature rules to `calt`, which will enable the ligatures without setting up `cvXX` / `ssXX` / `zero` in font features config, just as default ligatures
+- `disable`: Remove the ligature rules in `cvXX` / `ssXX` / `zero`, which will no longer effect, even if you enable it manually
+- `ignore`: Do nothing
+
 ### Chinese version
 
 1. Download CN base font at [Gitee release](https://gitee.com/subframe7536/Maple/releases/tag/v7.0-beta23)
diff --git a/source/schema.json b/source/schema.json
index 35a40ea..d85fd42 100644
--- a/source/schema.json
+++ b/source/schema.json
@@ -20,7 +20,7 @@
     },
     "feature_freeze": {
       "type": "object",
-      "description": "Freeze some font features (No effect on Variable font) \n enable: enable font features by default \n disable: remove some font features \n ignore: skip handle target font features",
+      "description": "Freeze some font features (No effect on Variable font) \n enable: Move ligature rules to `calt`, which will enable the ligatures without setting up `cvXX` / `ssXX` / `zero` in font features config, just as default ligatures \n disable: Remove the ligature rules in `cvXX` / `ssXX` / `zero`, which will no longer effect, even if you enable it manually \n ignore: Do nothing",
       "properties": {
         "cv01": {
           "type": "string",
@@ -186,7 +186,7 @@
         },
         "ss07": {
           "type": "string",
-          "description": "Make space optional in multiple less or greater (<<, >>, <<<, >>>)",
+          "description": "Make leading or heading space optional in multiple less or greater (<<, >>, <<<, >>>)",
           "enum": [
             "ignore",
             "disable",