How to run custom Mashups
Mashups quickly extend TargetProcess UI with almost any functionality. There are several places on each page (empty <div> ‘s) where you can add some new UI. Or you can hook up to the page's DOM and customize the available UI.
You need Admin rights to create and modify Mashups. Go to Settings → Mashups and click Add New Mashup.

Several mashups are freely available on GitHub. You can easily copy/paste the code snippets from there. For example, copy the content of https://github.com/TargetProcess/MashupsLibrary/blob/master/ClassesOfServices/ClassesOfServices.js to the Code field and set the Project_Planning_Kanban_KanbanBoard placeholder. Then click Save Mashup.

As a result, the Classes of Services mashup will be activated on Kanban Board.

You can remove some of the available Mashups. Put a cursor over a mashup in the list and click Delete. Then click OK to confirm.

Read more on TargetProcess mashups.