We have been wanting to get to this one for some time now! To make it easier for you to mash up your existing content or bring in questions from other peoples' Question Collections we have introduced a new feature today.
'Question Merging" enables you to select any questions from any Question Collection and instantly add them to the Question Collection that you're editing.
Here is a video overview of how that works:
We hope you find this useful and look forward to hearing how you get on!
