You can active de show number lines, but ...
How to chow number lines by default?
Yes, it´s possible!! after asking Adriana/Alex (WinEdt author)
"Yes. Options –> Preferences| Appearance. Click on the Help button for details"
Open the Options interface and select Bookmarks.ini. Add the TeX mode to the line LINE_NUMBERS_MODE_FILTER=:
and click on Load Current Script.