Parameters from Grid - lists of all parameters and their values of the selected component. Check the box to select the parameters to be updated. Parameters are grayed out if they cannot be used to update (e.g., when no components contain a parameter of that name).
Project Variants To Update Grid - a list of all variants that currently exist in the project. Check the box to select the variants to be updated.
Choose Component - click to open a dialog in which you can search for components.