How to have 2 question/field in the same line ?

Is there a way for Form to have 2 questions in 1 line? For example screenshot below how can I move it to the next empty space on the right?

Yes you can, you just need to Shrink the fields that you want to put in two columns.

Please check this thread for more information field positioning .
https://www.jotform.com/help/328-How-to-Position-Fields-in-JotForm

Thank you.

Thank you. What about an undo button for each single select or multi select option? Do we have ability to do so?

Unfortunately you cannot Undo/Uncheck Single Choice field once you selected an Option.

However, you can change your Single Choice Properties field and use Multiple Choice Properties then set a Entry Limit of 1 for minimum and maximum options.

This way, it will still act like a Single Choice Properties field but with the ability to Undo/Uncheck an option.

thank you