diff --git a/slides/problem.md b/slides/problem.md
index ece64e517fc3539d05ec291974e4c895bbff5d90..18da55ee832050774c1f7a5ae4af2fafad301316 100644
--- a/slides/problem.md
+++ b/slides/problem.md
@@ -855,6 +855,22 @@ Multithreading = false
 
 Defaults to `true`.
 
+## Shared-memory parallelism
+
+Set multithreading backend to e.g. `OpenMP` in `dumux/cmake.opts` before building the modules:
+```cmake
+DUMUX_MULTITHREADING_BACKEND="-DDUMUX_MULTITHREADING_BACKEND=OpenMP"
+```
+Other valid options are: `TBB`,Cpp,`Kokkos`,`Serial`. If left empty, it is automatically set by CMake. If no suitable backend is found, CMake defaults to `Serial`.  
+
+## Shared-memory parallelism
+
+During `dunecontrol`, the chosen backend is displayed in the output via
+```bash
+-- Dumux multithreading backend: OpenMP
+```
+
+
 # Exercises
 
 ## Exercises