CompanyHolidaysGallery: In the provided interface image, the Tree view pane (left) highlights the selected control, and the Properties pane (right) explicitly displays the name CompanyHolidaysGallery at the top. Holidays_1 is listed as the Data source, not the control name.

Play: The Play icon (a triangle) located in the top-right command bar is the standard function to "Preview the app" (shortcut F5), allowing the maker to test the app's behavior. The Stethoscope icon triggers the App Checker, used for identifying errors and performance issues, not for user testing.

formula: In Power Apps Canvas Apps, the visual presentation of data—such as date formatting—is determined by Power Fx formulas assigned to the Text property of a control. To change the format to "DD/MM/YYYY," you use the Text() function (e.g., Text(ThisItem.DateValue, "dd/mm/yyyy")). Changing the control or data source does not inherently change the string formatting.

Microsoft. (n.d.). Understand Power Apps Studio. Microsoft Learn. Retrieved from https://learn.microsoft.com/en-us/power-apps/maker/canvas-apps/power-apps-studio (See sections "3. Left pane - Tree view" and "6. Top right corner - Preview").

Microsoft. (n.d.). Text function in Power Apps. Microsoft Learn. Retrieved from https://learn.microsoft.com/en-us/power-platform/power-fx/reference/function-text (Definition: "Converts a number or a date/time value to a string of text... and formats it").