Yes. As of 1.0 there are events that make it so that you can add links or whatever to the manager welcome (or home) page. Here is a demo of how to do this with a plugin:
1) Note the ID of the parent where you want to create the new document. FOr this example lets say the parent is ID 12;
2) Create a new plugin, you can name it whatever you want, we will name it Custom Home Links for this example;
3) Paste int he code bellow:
// <?php
$e = &$modx->Event;
$output ='';
switch($e->name) {
case 'OnManagerWelcomeHome':
$output = "<h1><a href=\"index.php?a=4&pid=9\" title=\"Add Home\">Add Home</a><br /><a href=\"index.php?a=4&pid=12\" title=\"Add Rental Home\">Add Rental Home</a></h1>";
break;
default:
$output = '';
break;
}
$e->output($output);
return;
4) Before saving the plugin select the System Events tag and select the OnManagerWelcomeHome event
5) Save the plugin and go to the Manager home. There should now be 2 links in <h1> tags directly above the standard options.
You can style the links however you want by editing the CSS file located at media/style/MODxCarbon/style.css OR create a new theme and use a duplicate css file to avoid having it overwritten during an upgrade.
How to find out the URL for creating new docs or editing exiting docs? With experience you will know that the action for new docs is 4 so the a=4 in the url string will tell modx to create a new doc and the pid=12 will tell it the Perent ID (hence pid). The action for editing id 27 or a=27 and instead of pid you simply use id or id=10 to edit doc 10. The shortcut to finding these codes is to enter the edit resource mode in the manager and open the edit frame in it’s own tab and see the URL for it (or select open link in new tab directly when making the selection in the menu).
Anyway, I hope this helps.
Edit: Note that this can also be done manually by editing the manager home page directly. There is a wiki post that covers this method:
http://wiki.modxcms.com/index.php/Customizing_the_Manager_Homepage
I prefer to use a plugin since it will not be overwritten during upgrades and is easier to manage.