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, modify directly the Assignment Rate (
).
OR, click on the More (
) button, and select the Edit command to open the Cost Item Assignment dialog box where the Rate can also be modified.