To add a deviated price to an item, first find the item in the catalogue. Highlight it, right click and then select "Edit Prod".
Click on the pricing tab at the top and then click the "Add Deviated Price" at the bottom. This will create a row in the deviated pricing box in which you can set a special discount/net price etc.
If you wish for this changed price to revert back to the default, set an expiry date.
If you would like to set this price for a certain customer and not all customers, type their name in the "Customer" row and select them from the drop down box.
To remove the deviated price, click in "Delete Deivated Price".
Importing deviated prices is detailed here.
For Exporting/Clearing all deviated prices, click here.