This option will allow you to select various levels and products to which your mass pricing adjustments would be applied.
After you select the Manually set prices button, and select the level at which you want your price adjustments to be applied, you will see a large variety of ways you can select from to adjust the pricing at your selected level.
After you select the method you would like to use to adjust pricing, you will be provided with a list of all the pricing tiers. Select the tier or tiers to which you would like your adjustments to be applied.
After selecting your tiers, a category list will appear where you can select product categories to which you would like to apply your price adjustment.