Add a blank value to a Power Apps table

Adding a blank value to a Power Apps table is useful for adding a blank value to a dropdown or combo box of choices.

The formula below is added to the Items property of a dropdown or combobox, it receives distinct values from the Employee text column in the 'Paid Time Off' SharePoint list. A blank record is added to the MyTables column. 

drpEmployees.Items

Ungroup(
    Table(
        {​​​​​MyTables: Table({​​​​​​​​​​​​Value: Blank()}​​​​​​​​​​​​​​​​​​​)}​​​​​​​​​​​​​​​​​​​,
        {​​​​​​​​​​​​​​​​​​​MyTables: RenameColumns( Distinct('Paid Time Off', Employee), "Result", "Value") }​​​​​​​​​​​​​​​​​​​
    ),
    "MyTables"
)

The result is a combobox or dropdown with a distinct list of employees and a blank value at the top.