TYPO3 Core

for GMENUS you can enable access keys with accessKey = 1
To make this work for TMENU tslib_menu needs to be changed on line 1585:
// Set access key
if ($this->mconf['accessKey']) {
$this->I['accessKey'] = $this->accessKey($this->I['title']);
} else {
$this->I['accessKey']=Array();
}

And right below:

// Title attribute of links:
                $titleAttrValue = $this->WMcObj->stdWrap($this->I['val']['ATagTitle'],$this->I['val']['ATagTitle.']);
                if (strlen($titleAttrValue))    {
                    $this->I['linkHREF']['title'] = $titleAttrValue.' '.$this->I['accessKey']['alt'];
                }

I've made the changes in the attached file

(issue imported from #M4133)