Click Actions, Access Control, Pages, etc. there is a helpful "Build" button.
This build button presents the screen shown opposite with all the Top Level Data Sources available at that point of the App. You can then select from available:
Single Entity Properties
Multiple Entity Properties
Simple Data Properties
and, where appropriate, Classifications
in order to select the property you want without having to worry about typos or mistakes in selecting the data path.
The data source property builder within Evoke provides quick and easy way to select the right properties whenevr you need to select a data source property. When you have selected the required data source property, simple use the "back arrow" to return to the point where you requested a data source property build or use the "undo changes" button to return without change.