How to group similar questions or modifications of a question

Tick the questions to be grouped and click the group icon in the top menu.

Press the "Save" button.

Done. The question group is indicated in the bottom part of the card. The number of cards in the group is stated as well.

Click on the icon to display the questions in the group.

If you have no modifications of a question, you can create them easily. Just copy the question and modify the copy: How to create a modification to a question (copy of a question in the same group)