Creating a new master measure directly from the list of fields in the app is the most straightforward way. The following steps will be required:
- While in Edit mode on the sheet of an app, navigate to your left-hand panel and open the Fields menu. In there, you will find a list of all available fields of the data model.
- Choose a field you wish to serve as the basis for a master measure by right-clicking on it and adding it by creating a new measure.
- The following dialog menu will pop up, where you will see the selected field added to the Expression. You can then either type in the expression directly (and move straight to step 5), or click on the orange fx (standing for functions) to open the expression ...