I'm making a leave request where the user picks which department he/she is in and also their manager to send the request to. I don't want the user to manually type anyone's email address. I want a drop down column of 'Department' and a dropdown column of 'Managers'. See the photo. I already made these dropdown columns, and they are taking information from the same list. Thing is, I want so that whichever Department they pick, it only shows the managers of THAT department. For example, in the photo they selected 'Engineering'. In the column Manager it is showing all 4 managers but I only want the manager of the Department to be seen. Reza is the manager of Engineering so I only want his name shown, no one elses. If you need any more info let me know. I am new to this and do not know much of the jargon, or if I am missing a key detail in order to recieve help. Thanks.
UPDATE: Thanks to the first person that replied. As you said, I created Department as a Lookup column and select Manager as an additional column. However, I am still getting a drop down of ALL the managers. Is there some secret setting I have to enable. I am at a lost of what I'm doing wrong...