is it possible to grade person despite he/she has never done test online and hasn't records that ever did test? ty
yes it is - you can use the offline assignment type for that (add an activity>offline assignment) or else you can go straigh to the gradebook and set it up there.
well, i dont want to make it offline all, but if not all persons has possibility to do through moodle than i manually grade it
well yes -so as long as they are enrolled in your moodle course you can give them a manual grade even though they didn't send you anything in Moodle.
how to do it in the easiest way? not modifying in everyone's profile?
You can add grades manually for some work a student has done NOT in moodle (isnt' that what you want) by setting up an "offline assignment" which you get to from add an activity>offline assignment. This just gives you a space in the gradebook to add marks even though they haven't done work on Moodle.