To keep your board organized, you can add labels, which will add colors and grouping options to the cards.
It is also possible to create and edit these labels in Placker by clicking the board title to open the information pop-up, and add the labels, as in the GIF below.
In case this board is imported from Trello, it is required to edit them there, though.
After this first process, you will be set to add labels to each card using the panel, as described in this article.
Sorting members and labels
It is possible to reorder members and labels in the board settings (clicking the board title).
To sort labels and members, click the dots next to one of the labels and drag it to the position where you would like it to be.
When you do this, the new order will be visible in the view layouts and in the card member and label selection, as represented in the image below: