diff --git a/TODO.CCR b/TODO.CCR
index 93b15aec9..b0e1df388 100644
--- a/TODO.CCR
+++ b/TODO.CCR
@@ -3,3 +3,6 @@ TODO for CCR support
 - make tank pressure plot work for bailout dives
 - bailout handling in SAC rate calculation
 - UI to modify the tank type for CCR (i.e., set the diluent and oxygen cylinders)
+
+- UI visualisation of o2 setpoint values and separate oxygen sensor values, probably
+  using the same space as the gas partial pressures underneath the depth profile.