I wanna modify a file.osm which contains my board outline. (see attachment).
I wanna open the file.osm and then get the text (see the attachment) to modify it. (Maybe a batch method...)
When I modify the file.osm I can save the new.osm
Do you have any idea to do that?
I wouldn't do it that way. I would either put a property on each of the text items that you want to change and then change the text from the board once the symbol is placed or use descriptive placeholders instead of xxxxx and, again, change them once placed.