PROBLEM DESCRIPTION

If you suddenly have trouble seeing any of your video here is a note on FTB.

SOLUTION AND WORKAROUND

Remember that FTB (Fade to Black) is effectively the final video layer before output, and will hide all other layers when active. Click this button to enable or disable FTB.

Click image for larger version. 

Name:	ftb.png 
Views:	115 
Size:	6.5 KB 
ID:	124555

So basically, FTB obscures all other output, the button pulses when FTB is active