The tool opens to show an empty, unlabelled Carroll diagram. This can be populated by dragging items from the dock underneath. The tabs within the dock allow you to choose the items to drag into the diagram. Any unwanted items on the diagram can be dragged into the bin. To remove all items from the Carrol diagram, click the ‘Clear all’ button above the bin.

You can edit the title and labels by clicking on ‘Click to insert title’ and on the word ‘label’.

Clicking ‘Reset’ undoes any changes you have made and returns the tool to its default state.