Hello Maverick. Thanks for your help. Your kindness and generosity is out of this world. I have some questions and I decided to forward all of them here.

1. in the multiple image selection Is it possible to have arbitrary number of rows? 3 4 5  images in a row?

2. Is it possible to have some pictures and let the students write number or a word under them? Sth like this?

3. I have turned the “allow retry” option on and “allow multiple retry” off. But when the student fails the exam, there is no “retry” button at the end of the question. He has to click on the quiz title and start it again. Which is really confusing.

4. I have added my Persian font in the option and Tcpdf folder too. But my pdf downloads with “?????????” Marks instead of Persian fonts.

5. In Persian which is right to left, my radio buttons comes after the choices:

thank you in advance.