Here is how to add scaled by screenful power-up in trello
- First click on the "Boards" item in the left sidebar
- Then click on a board in the workspace section
- Next click on the "More options" button (three dots) in the top-right corner of the board
- Then click on "Power-Ups" option in the dropdown menu
- In the Power-Ups window, click on "Developer tools" category in the left sidebar
- Then click on the "Add" button under the "Scaled by Screenful" power-up card
- Finally click on the "Add" button in the Scaled by Screenful details dialog to install it






