where I can set this, I my installation PO is inline and SO is pop-up I would like to configure this consistent

looking for the same here. I also tried replacing the files from windows installation into the tar files but this has broke the db. Now i don't know where have the option to select the inline editing

well, i've upgraded to the last version and that solved. I've been reading and is like filsys said, in the xml for the view of order sale, you have to set editable="top"