Gantt Chart: need to fold some data rows

Hi everyone, As you can see in the image, I have two projects phases i.e. Requirements and Preparation portfolio profiling. Just below the phases you can see the activites associated to the respective project. Now, I want something like a “+” sign in excel with which I can fold or unfold the rows (associated activites). Could anyone help me out here? Thanks in advance :)  
0 answers