Filter tier not working

Hi, I need to merge several tiers into one, but some of my annotations overlap. Ideally, I’d like to keep all annotations, with the shorter ones appearing on top of the longer ones. Is that possible?
Thanks

To start with the last question: it is not possible to have overlapping annotations on a single tier. So, if you need to merge tiers into one, the best that can be achieved is that the shorter ones overwrite (parts of) the longer ones.
If it would concern two tiers a combination of the functions Tier->Annotations from subtraction (to subtract or “knock out” the annotations of one tier out of the other tier) and than use Tier->Merge Tiers to merge the new tier with the first, knocked out, tier. In the case of more than two tiers things become more complicated (the same procedure might need to be repeated multiple times). And the result might not always be what you want.

-Han