I have a board that I am linking to another. The first board is meant to summarize a list of projects currently being worked on. The second board provides a more granular view by task for the different projects (groups) with progress bars. I am now trying to link the progress of these individual projects to the summary view by mirroring; however, I need to link to the overall project progress of the aggregated individual tasks within that project since I’m trying to provide an overall summarized view. Is this possible? I sure hope so.
I had this same question and have only found one solution/work-around at the moment. It can be accocmplished using the ‘Connect Boards’ along with Mirror Column. Pretty good walkthrough video and how-to here: https://support.monday.com/hc/en-us/articles/360001733859 You would select all relevant tasks on the ‘Connect boards’ part and will show the summary.
I do find it likely to have problems with this update structure still though as adding the tasks on the high level summary board is still a manual process as you cannot just ‘Add all tasks’ from either a group on that board, or the board itself…that is what I hope to see in the future… But for now at least it is something…