1. Edit your Console App.

2. Add the Macro Browswer.

3. Go to your Console app.

4. Select Case tabs.

5. Open a case record.

6. Select Macros.

7. Click “Create Macros”.

8. Create a new Macro.

If you are unable to select any instructions, check the below link

https://infallibletechie.com/2015/07/unable-to-choose-any-macro-instructions.html

To run the Macros, Check the below link

https://infallibletechi.com/2015/07/how-to-run-macros-in-salesforce.html