Is there any easy way to add a tooltip to an image? If so, please let me know what the code is. Thanks.

Hi Gerald. Click the image, there's a property called "Title", fill it in and voilá :)

 
 Hi Gerald!

You can add in the extended properties the Title has António said like it's shown in the following picture:



Best Regards
Tiago Jesus

Actually I meant the "Label" built-in property, now that I look at that screenshot. Didn't bother to check the IDE for the correct name.
No need to fiddle with extended properties for this when dealing with an image, just fill in the "Label" property of an image and it'll be shown as the tooltip. :D