If you want to manage the attribute 'Ships from' in a bulk and apply these changes to all products with this attribute - this option will be very useful for you.

Go to AliDropship -> Settings -> Manage attributes:

Click blue button with text you need or enter the name of the attribute in a search field:

If you have products with attribute 'Ships from' you will see the attribute and its values:

You can delete the whole attribute clicking on the trash icon near the name of the attribute:

Or you can delete one of the values of 'Ships from' attribute:

Or you can rename the attributes and its values:

To apply changes click 'Update products':

Changes are applied:

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