Just as you can create custom patterns, you can also create your own, custom markers. In order to do so, draw the marker you're envisioning, then make it available for use by doing Object > Object to markers.
Your marker is now available at the top of the list of markers in the drop-down menu.
Markers are placed on the nodes of paths.
The dialog that gives you access to markers.
There has been error in communication with Booktype server. Not sure right now where is the problem.
You should refresh this page.