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Go to the page of the survey that you want to add to a project
If your organisation created the survey, you can access it from the Manage Organisation Surveys page
Other surveys can be found on the Explore Surveys page
Once you arrive on the Survey Template page, you will see the red Add To Projects button
Click the Add To Projects button
A popup appears that lists all the projects you have editorial access to
Tick the project(s) that you want to add the survey to - if the survey has already been added to a project, it will already be ticked
Press Save to add the survey to those projects
The popup closes
Reload the page
The Projects using the survey box (in the right side panel) will list the projects that you have added the survey template to. Clicking the name of the project from here will take you to the Survey Campaign page for that survey on that project