5.3 Steps of adding a post-function to workflow

Step 1 - Enter ⚙ > Issues > Workflows. Find your workflow and click Edit.

Open

Step 2 - Focus on your target transition, click Post Functions on its options panel. 

Open

Step 3 - Click Add post function.

Step 4 - Choose a post function, click Add.

Step 5 - Add parameters to functions.

Step 6 - After added the post function, don't forget to publish the draft workflow to make it take effect.

Note: Take care of the order of post functions. They will take effect one by one.