01) Access the Control Panel
02) After login click on Catalog
Option 1:
03) After Click Multiple Product Administration
Select the category or subcategory
Select the products you want to change
At the bottom of the right side select Change price
Select + or -
Select% or blank to change by value
Fill in the field next to it is only accepted numbers. Example: 10
Warning: this process is irreversible
04) After clicking on the CONFIRM button
Option 2: (This feature has usage limitations on the shared plan due to server overhead)
03) After clicking Quick Updates
Select the category or subcategory
In the field (+/-) Value or rate type by example: 10, 15%, -20, -25%
After clicking the VIEW button
After unchecking the products you do not want to update the price
After clicking on the UPDATE button