1. Click to add a new task

Click on free space in a column or select Board-Add task.
2. Set card properties

Select card icon, text, background color and text color. You can also click "Random" to generate contrast colors.
3. Specify attachments

Enter attachments into "Attachments" field. You can click on "file" or "folder" icons for easy navigation or enter file names, emails and URLs manually. You can also specify card tags. Tags allow to filter the board. Check "Show progress" if you want to track progress of the task.
4. Edit checklist items

You can also specify checklist items. Checklist appears on the board and allows to check and uncheck items as you progress on the task.