A free program for Android, by Jawomo.

Easily customize the Bixby button on your Samsung Galaxy phone with bxActions! With this app, you can choose what action you want it to take with just one click. Whether it’s muting your phone, taking a screenshot, or turning on the flashlight, bxActions has a wide variety of options to make your life easier.

This application is compatible with the Bixby button on the Samsung Galaxy S10, S9, S8, Note 9, and all others. It is not compatible with older models.

First, install this application and make sure that it is enabled in the settings. Then, open the app and follow the instructions. You will need to connect your phone to the computer.