WE don't delete posters b/c of bad ratio (see other response in other topic) , this one is not a duplicate, so it can remain.

ok...i thought you do it, thanks a lot. One question....how a poster is selected as the one shown on the main page ?

That depends on which on is the highest voted (most thumb ups, fewest thumb downs)

Moderators can also set a plain text, high quality poster as primary.

This is what I supposed....but the votes are not vissible. Thanks.