You can share highlights across projects by importing them to the project where you want to analyze them. To do this, first navigate to the Highlights page. On the right hand toolbar, select the import icon.
On the first screen, select with project you want to import highlights from. Click Show Highlights to get to the next page. From the selection screen you can select individual highlights you want to import, or you can select all. Use the filters on this page or search key words to find specific highlights.
Once you've selected all of your highlights, click Import Highlights to see a confirmation screen. Here, you can review and remove any highlights you don't want imported. Click Import Selection and keep that screen open while the import finalizes.
You should see a confirmation screen when it has completed.