Description

Doing something like ...|?Description 1|?Description 2| ... will result in a compound concatenated string that is displayed for each event. Make sure you are using the latest git repo because I saw http://www.wikiteater.se/ still uses the old tooltip. The new tooltip is capable of displaying images but the event calendar tooltip does not make use this capability but you are free to implement such feature. For an example on what needs to be done see [1] to add the appropriate image content to the tooltip ... content:

tooltip.show( {
	context: element,
	content: event.description.substring( 0 ... ,
	title: mw.msg( 'smw-ui-tooltip-title-event' ),
	button: false
} );

[1] http://craigsworks.com/projects/qtip/demos/content/images

James Hong Kong (talk)