Randomising the order of answer options often leads to the need to have some answer options/subquestions fixed in a certain position, for example an exclusive option like "none of the above". Right now the only solution for this is to use Javascript.

I would propose a column in the editing list of the answer options or subquestions with a checkbox for each line to mark it as "fixed position" or, conversely, as "randomised". For example: If an answer option/subquestion is in third place and "fixed position" is marked, it always stays in third position. The other way around (less preffered because more clicks) would be to mark all answer options/subquestions that should be part of the chosen type of randomisation and leave all others in place.

Additionally, to be able to easily set the Other text field before any exclusive options at the bottom, but also at the bottom of all randomised options, for example, it would be good to not only have the option "After specific subquestion" but also "Before specific subquestion".