When using the Report designer you can enable fancy toggeling of fields. Once you know the trick its realy easy.
Make sure you have multiple fields in rows or columns. Select the field you want to toggle and go to edit group and the tab visibilty, put it on visiblity hidden and check the “visibility can be toggled by another report item” box and select the parent report item you want to toggle. Thats all there is to it.