Tracking Projects on Smartsheet


I currently have a list of projects that i'm tracking on a smartsheet,

However if I were to add milestones/tasks, I’m unable to merge the rows under column “Project Name”, “Project Manager” thus having multiple rows with repeated Project names etc.

How do I go about setting this up all in 1 smartsheet? As ideally I would like to “request an update” to the project manager to update the status of the project milestones in 1 request instead of sending multiple rows with the same project name.

 Thanks for your help in advance!