Change Points in an options Partial Score, but it revert back to ZERO!

[Rapha6]

I am in a mutiple choice question.

1. In the WIndows -> Quiz (panel), I select the partial score option

2. I select an answer

3. I go to Properties panel -> Options

4. I find the Points: 0

5a. I change the value of the zero to another # and hit [ENTER]- Points goes back to 0

5b I change the value of the zero to another # and click outside of the Properties panel - Points go back to 0

Umm.. help? (I know the video is little. Hover over and click the full view to see my changing of POINTS not work).

[Rapha6]

possible answer:

Parital Scoring --> POINTS changing value WORKS *if* you

(1) Select Partial Score in the Quiz Panel (from Window)

AND  (2) check the "Multiple Answers" above it.

Which seems a tad wierd, you could have one correct answer and still reward "parital score/credit" for other answers. That being said, I can also see how you shouldn't be able to assign less scoring for answers that are technically incorrect / but partially correct.

[Lilybiri]

Partial scoring is only possible ina MCQ with MULTIPLE correct answers.  Seems very logical...to me. You try to apply this to a MCQ with ONE correct answer?

What do you understand by 'partial scoring'?