Merge pull request #1954 from rundeck/run-4890-docs

[RUN-4890] Document ACE editor manual resize default change

Author: fdevans

docs/administration/configuration/config-file-reference.md

@@ -1119,15 +1119,19 @@ Sets the maximum amount of runner report data the server will store in the datab
 ```properties
 rundeck.runner.compactProcessor.maxReportDataSize=1gb
 ```
-=======
+
 ### Code Editor Settings
 
-Controls the height of the ACE code editor rendered inside plugin configuration forms (for example, inline script steps, orchestrator configuration, and execution lifecycle plugins).
+Controls the sizing behavior of the ACE code editor rendered inside plugin configuration forms (for example, inline script steps, orchestrator configuration, and execution lifecycle plugins).
 
 | Property | Default | Description |
 |----------|---------|-------------|
-| `rundeck.feature.guiAceEditorMinLines` | `12` | Minimum number of visible lines shown in the editor, which sets its minimum visible height. |
-| `rundeck.feature.guiAceEditorMaxLines` | `0` | Maximum number of lines the editor auto-expands to. Set to `0` for unlimited. |
+| `rundeck.feature.guiAceEditorMinLines` | `0` | Minimum number of visible lines in the editor. `0` (default) makes the editor manually resizable via a drag handle. A non-zero value disables manual resize; the editor starts with enough height to show that many lines and auto-expands as lines are added. |
+| `rundeck.feature.guiAceEditorMaxLines` | `0` | Only applies when `guiAceEditorMinLines` is non-zero. Caps how far the editor auto-expands: once content reaches this many lines, a scrollbar appears instead of the editor growing further. Set to `0` for unlimited. |
+
+:::tip
+Manual resize is available now on Runbook Automation **SaaS**. On Runbook Automation **Self-Hosted**, the default changes from `12` to `0` (manually resizable) starting in **Rundeck 6.3.0**.
+:::
 
 These settings can be changed at runtime via **System Configuration → GUI** without restarting Rundeck. The new values take effect on the next page load.