If you have created more than one campaign under a given advertiser, you can switch between campaigns by clicking on the campaign name and choosing a ‘sibling’ campaign. You can switch to a different campaign from any of the following campaign sub-tabs (Lines, Campaign Performance, Campaign Properties).
To select a different campaign under the same advertiser:
Click on the drop-down arrow next to the campaign name.
Select from the displayed list or filter the displayed list based on text or campaign ID.
Select the campaign you want to work with.
In the list of campaigns in the drop-down list, the current line is highlighted in bold.