Press the Rec Mode button to select the default you want.
You can also set it from the Display menu where the current default will be in lower right corner.. pres Rec Mode button to change.
Be aware that any HDD>DVD dub made at some OTHER rec mode will set THAT mode as the default, so check after such dubs. Only HIGH never changes the rec mode.
Please click the 1st link in my sig. for an index of help files where all this info is available.