Goal
Add Watermark to the assets uploaded to AEM 61
Thank you Aanchal Maheshwari for the tip...
Solution
1) Access workflow console http://localhost:4502/libs/cq/workflow/content/console.html
2) Double click on Dam Update Asset workflow http://localhost:4502/cf#/etc/workflow/models/dam/update_asset.html
3) Drag and drop Add Watermark step available in DAM Workflow of Sidekick
4) Double click on the Add Watermark step and fill relevant fields, minimally Text in Arguments tab
5) Click Ok on the dialog, donot forget to save workflow
6) Access Assets console http://localhost:4502/assets.html/content/dam
7) Upload a sample asset and the watermark should be appear in Position selected Centre, check by accessing asset detail page eg. http://localhost:4502/assetdetails.html/content/dam/geometrixx/Tulips.jpg