Here is how to add card cover refresher in trello
- First click on the "Boards" option in the left sidebar
- Then click a board in the workspace section
- Next click on the "..." (more options) button in the top-right corner of the board
- Then click on "Power-Ups" option from the dropdown menu
- Next click on "Automation" category in the left sidebar of Power-Ups window
- Scroll down and click on "Card Cover Refresher" power-up
- Click on "Add" button in the Card Cover Refresher details section
- Finally click on "Add" button in the confirmation dialog to install the power-up




