To bulk-update stock, enter an amount in the input field for stock, then find the select option box below.
In the dropdown, select increase or decrease then the amount will be added to all visible products in the table. On the left side in the table you will see that the checkboxes has been checked of, if there is products you do not want to update – just uncheck them.
You can also set a fixed value if you do not want to, set the value and in the dropdown box select set fixed, now all rows has this value. When ready, select the Save all button at the top right off the table.
Automatic stock management is an option set in settings. This can be used if you do want to automatically turn off stock management on items with null values and default set in stock on these products. If you for some reason decide that a product now needs to use stock, just enter the stock value i.e 10 then stock management automatically is turned on again and set the default in stock status.