I try to make a report similar to the demo report "leads by activity",

Click image for larger version

Name:	
Views:	0
Size:	38.1 KB
ID:	26532

in order to see who has not been contacted for 'a long time' (1 month) . I tried to edit the report on demo site to understand how to do it. however it does not show any editable parameters .. as shown by the following picture.

Click image for larger version

Name:	
Views:	0
Size:	21.7 KB
ID:	26533