private String getHistoryName(URL URL) {
		String text = URL.getFile();
		int index = text.lastIndexOf('/');
		if (index != -1) {
			// we want just the filename
			text = text.substring(index + 1);
		}

		String ref = URL.getRef();
		if (ref != null) {
			text += " - " + ref;
		}
		return text;
	}
Create zoom in/out buttons on the default help window toolbar.
@param jHelp the java help object used to retrieve the help components
Ghidra/Framework/Help/src/main/java/help/GHelpBroker.java