The basic idea is an app for a winter service that travels to its customers depending on the weather.
I have a list in Google Sheets for “Master-DataBase”
A = street
D = Status (done / open)
I can handle the item click event for employees.
But…
The boss should have a button where he can set any status to open.
In other words, he has the same list as the employees to see how work is progressing.
Since the work (winter service) is independent of time, I absolutely need this reset button.
How do I proceed here? Anyone an idea?
Update Value Block? If yes - how do I do that?
Thank you in advance 
If you are wanting the boss or someone in a different user role to be able to “reset” the value in a paricular row, you’re right in that you’ll just want to use the update value block from the Data Source drawer.
However, if you want to have it so only the boss can see or use this button, you’ll need to implement authentication and base the UI that is seen based off of who signs in.
Thank you @matt_conroy
But i want to change the complete column - not a single on (like “click on Item” with row ID)
Boss click on the button → the hole column change to “open”.
Wth the user Sign In, i´ve created a different Screens and work with groups.
BR and thanks in advance