The halo is a major means of interacting with Morphic objects. It consists of Halo buttons.
If you want to do something with a morph that does not involve simple mouse actions, then the next thing you should try is to blue-click on the morph to bring up its halo.
Each circle in the halo performs a different function; try them all and see!
blue-click:
alt left click on Windows
cmd left clikc on Mac
middle button
NathanDenny: The blue-click halo can be disabled by overriding the wantsHaloFromClick method to return false.