So this is how you can enable multiple selections in a drop-down in Google Sheets. While this is not available as an in-built feature, you can easily do this with some Google Apps Script magic.

Learn how to change the drop-down options in Google Sheets, edit list items manually, or change the contents of a range of cells.

It's easy to add a drop-down list in your Google Sheets in order to sort and organize data. Here's how to do it.

How to add scripts to Google apps If you’re comfortable with JavaScript, you can write your own original programs. Just open Docs or Sheets and go to Extensions, then click on Apps Script.

And, if you enter data in the Google Sheets mobile app on Android or iOS, does a drop-down list make data entry faster and more efficient?