Complete the following steps to add and existing activity to a topic:
1. In your course, click Content.
2. Select the unit you want to add the activity to.
3. Click Add Existing.
Image
![Step 1](/sites/default/files/styles/large/public/2022-11/1_0.png?itok=2U6ifKMn)
4. Select the activity e.g. Discussion
Image
![Step 2](/sites/default/files/styles/large/public/2022-11/2_0.png?itok=ytBnn5Jc)
The Insert a Discussion window appears.
5. Select the location for the Activity.
Image
![Step 3](/sites/default/files/styles/large/public/2022-11/3.png?itok=DY9jl8wP)
6. Select the Activity (which discussion topic you want to link to)
Image
![Step 4](/sites/default/files/styles/large/public/2022-11/4.png?itok=_VmwfY6s)
Optional: Click the Visibility toggle to make the activity available to learners.
Result
The existing activity has been added to the topic.