To like a Page as your Page:
- Go to the Page you want to like
- Click below the Page's cover photo
- Select Like As Your Page
- Select a Page and click Submit
To see a list of all the Pages that your Page has liked, go to your Page and scroll down to Pages liked by this Page in the right column.
To see posts from Pages you've liked as your Page, go to your Page and click See Pages Feed in the right column of your Page.