“in to out” in Mastering settings is not what you want.
go to the main, “video” page,
at the top, change “mastering” to “Editing”
set in and out points in the edit to tape window,
and an in point in your source sequence.
load sequence into viewer,
then drag to “insert” in ETT window.
should work.
cheers,
nick
(Sydney, Aust)