Log in to the HTML5 client.
Select the Work workspace, Gantt tab.
Select a project in the Project Data Selector.
Select a task in the Gantt spreadsheet to display the Task panel.
Select the Transactions & Cost Items tab ().
In the Cost Item Assignment card, click on the More () button, and select the Replace command to open the Replace Cost Items dialog box.
Replace the Cost Item assignment with one or several Cost Items.
Close the dialog box.