Update modx.sendforward.md

another example has been added

en/extending-modx/modx-class/reference/modx.sendforward.md

@@ -25,15 +25,15 @@ void sendForward (integer $id, [string|array $options = null], [boolean $sendErr
     - `merge`: a way to merge the resource currently in `$modx->resource` with the target resource. The `content`, `pub_date`, `unpub_date`, `richtext`, `_content` and `_processed` values are excluded as well as the value of the [forward_merge_excludes](building-sites/settings/forward_merge_excludes) system setting. I'm not sure if this is supposed to be used out of the core and there's probably better ways to get data combined (eg: `setPlaceholder`) then merging.
 - `$sendErrorPage` Whether we should skip the [sendErrorPage](extending-modx/modx-class/reference/modx.senderrorpage "modX.sendErrorPage") if the resource does not exist.
 
-## Example
+## Examples
 
-Send the user to Resource ID 234 without actually changing the URL.
+1. Send the user to Resource ID 234 without actually changing the URL.
 
 ``` php
 $modx->sendForward(234);
 ```
 
-Send user to 404 Error page, for actual page ID we use [error_page](building-sites/settings/error_page) system setting value. If there is no such value,
+2. Send user to 404 Error page, for actual page ID we use [error_page](building-sites/settings/error_page) system setting value. If there is no such value,
 the value of [site_start](building-sites/settings/site_start) will be used.
 
 ``` php
@@ -46,6 +46,19 @@ $options = array(
 );
 $this->sendForward($this->getOption('error_page', $options, $this->getOption('site_start')), $options, false);
 ```
+3. Show replacement page, keeping original `pagetitle`, `introtext` and other fields. To do this, you just need to specify an additional array with keys:
+
+``` php
+$options = array(
+	'merge' => 1, // field gluing mechanism enabled
+	// original fields list that need to be excluded from the result
+	'forward_merge_excludes' => 'id,template,type,published,class_key'
+);
+$this->sendForward(15, $options);;
+```
+[forward_merge_excludes](building-sites/settings/forward_merge_excludes) setting manages source page fields that need to be excluded from the results. Next fields will definitely be added as well: `content,pub_date,unpub_date,richtext`
+
+This is good approach if you want hide/protect some resources but left `pagetitle` and `description` for visitors and search crawlers.
 
 ## See Also
 
@@ -55,3 +68,4 @@ $this->sendForward($this->getOption('error_page', $options, $this->getOption('si
 - [modX.sendErrorPage](extending-modx/modx-class/reference/modx.senderrorpage "modX.sendErrorPage")
 - [modX.sendUnauthorizedPage](extending-modx/modx-class/reference/modx.sendunauthorizedpage)
 - [error_page](building-sites/settings/error_page)
+- [forward_merge_excludes](building-sites/settings/forward_merge_excludes)