diff --git a/app/config/schema.json b/app/config/schema.json
index 6bcf850036eb..b6334159a2b8 100644
--- a/app/config/schema.json
+++ b/app/config/schema.json
@@ -236,6 +236,7 @@
                     "type": "boolean"
                 },
                 "scrollback": {
+                    "description": "number of lines to keep in memory for scrollback\n\ndefault: 1000",
                     "type": "number"
                 },
                 "selectionColor": {
@@ -563,6 +564,7 @@
                             "type": "boolean"
                         },
                         "scrollback": {
+                            "description": "number of lines to keep in memory for scrollback\n\ndefault: 1000",
                             "type": "number"
                         },
                         "selectionColor": {
diff --git a/typings/config.d.ts b/typings/config.d.ts
index 7a6053e93fe3..864944befcf5 100644
--- a/typings/config.d.ts
+++ b/typings/config.d.ts
@@ -125,6 +125,11 @@ type profileConfigOptions = {
    * set to true to enable screen reading apps (like NVDA) to read the contents of the terminal
    */
   screenReaderMode: boolean;
+  /**
+   * number of lines to keep in memory for scrollback
+   *
+   * default: 1000
+   */
   scrollback: number;
   /** terminal selection color */
   selectionColor: string;