Windows: Function to insert "no schedule" when the schedule is empty.

In the Android application, we use a widget to display future appointments on a line. However, the lines for days with no appointments are not displayed and are skipped, making it difficult to keep track of the date and time for some periods. Therefore, I would like you to add a function to insert a sentence such as "No appointment" on days when there are no appointments in the line display style widget. I would also like to be able to change the color of that text. I use this app on both my PC and my phone. Thank you.