I have tried to make a text object invisible until about 1/2 way through my animation.  I have selected a time on the timeline and set "invisible" in the prop manager, then later on the timeline I have set the prop "visible" on the prop manager, but this did not work.  Can this be done with text?  If not, would a mask help me hide the text until I wished it to appear?  I have not used a mask and would need instruction if that is the way to accomplish this.  Help, anyone?