View source for overlay (roll option)

{{stub}}[[Category:Roll Option]][[Category:Display Roll Option]]

[[Image:overlay_example.png|thumb|right|Note the selected units have dynamic health bars in the top left. Additionally, the onChangeSelection event is being used within the overlay to show health bars over only selected tokens.]]
Overlays are a MapTool 1.7+ feature which places a transparent HTML5 overlay over the map view. Players can click through the overlay to affect the map as normal, but clickable effects on the overlay will work as intended. 

Between HTML5, CSS, and JavaScript, this allows for graphical user interfaces akin to Diablo and WoW.

== See Also ==
* [[frame5 (roll option)]]
* [[dialog5 (roll option)]]
* [[onChangeSelection]] event
* [[Whitelisted Content Delivery Networks]]