The Edit Menu button is not present in Fedora 18 Xfce spin, but if you follow these directions you'll be in business.
First, we need to install Alacarte menu editor. Open a terminal and type:
$sudo yum install alacarte
If this were Gnome that would have sufficed, but when you go to click Edit Menu button and then 'New Item', the Create Launcher window fails to come up. It turns out that a call to a missing gnome executable is the cause. So adding this command from the terminal will fix it:
$cd /usr/bin $sudo ln -s exo-desktop-item-edit gnome-desktop-item-edit
Open with right-click on the Applications Menu button, then click properties:
|Right-click Applications Main Menu button and then click Properties|
When the Applications Menu comes up, click the Edit Menu button:
|Applications Menu, click 'Edit Menu' button|
Main Menu Editor should appear and when clicking New Item, a new Create Launcher should appear, which was the issue this story shows how to fix:
You can now edit your Menu. As it should be. I hope the Fedora Team take note and will fix this in Fedora 19.
That should do it.