If you want to change the porfolio of a single campaign, click on Portfolio and search for the new portfolio or add a new one.
If you want to change the portfolio for multiple campaigns at once, filter for these, select them and use the bulk action "Change portfolio" to assign them to the new portfolio.
Please note: Budget and optimization errors may occur. In addition, the reporting may show inconsistencies.
Therefore, we recommend creating a new campaign in the new portfolio instead of moving an existing campaign to a new portfolio.