I know it is my fault - I’ve been fiddling with the Skin Designer in scheduler but now
I’ve lost the icons on the event popup.
Any ideas how to get them back please?
Check dhtmlxscheduler.css, it must contains the css rule similar to next
div.dhx_menu_icon {
background-image: url(imgs/controls.gif);
Check that rule is in place and url points to a valid sprite.