When adding more keywords to an existing project, by design, the option to run a partial update is automatically displayed.
However, this does not consume additional units from your resources quota, so it is limited to 500 units.
Whenever the partial update limitation is exceeded, you can choose from the following options to collect rankings for the newly added keywords:
wait for the next scheduled ranking update to run (if using automated updates by scheduler - weekly / biweekly etc)
run an on-demand project update, using the available options (1 day / 1 hour / 1 week)
Do you have any other questions? Don’t hesitate to get in touch and we will keep building the FAQ.