Yellow triangles

Hi - Re FotoMagico Pro - excellent software and I can highly recommend the DVD/online training from video2brain: (I have no connection with the organisation).
Can you confirm what the yellow triangles that appear sometimes above the thumbnail pics in the time line signify?
Thanks Derek

That is a coincidence , your link to the tutorial just came out yesterday!! Bye the way the triangles are quite obvious to,

Not obvious to me Beth (by the way [sic] you used the wrong “to” it should be “too”.