Icons to set start and end of a sequence for thumbs..where ?

[Merlin]

Hi,
I now have TMPGEnc Authoring Works 4, when I used DVD Author, I seem to recall I could double click a thumbnail, it would default to the movie clip it represented, and that there were two icons that could be used to set start and end positions of the clip from it I wished to use to run and loop in the thumbnail. I dont see anything now other than play/pause. slow fwd slow back, ffwd and ffback, and an audio slider. How does one select the start / end of the footage to use in the thumbnail ? There is the tickbox called loop selected sequence range at right of these controls so I think I am on the right route here. Perhaps a setting in global somewhere, but I looked and didnt see one, is that the secret to this ..where is it ?

Merlin

[darnun]

Not sure if you still need this but the options you're after will only appear in you choose the option to "Loop selected Sequence" to the right of the player buttons after you've double clicked the thumbnail.