On any mobile fone running Android, it is impossible to select the whole script line. If you slowly try to move the line to expose more of the script line and then attempt to move the blue end mark of selection to select more of it, it will select everything else in the thread at the top. Is there any other way to select a script line?
Here everything gets selected. And the Select All option will select everything in the post. It is impossible to select the line.