diff --git a/csaxs_bec/bec_ipython_client/plugins/flomni/flomni.py b/csaxs_bec/bec_ipython_client/plugins/flomni/flomni.py
index d9e3de0..6528aa7 100644
--- a/csaxs_bec/bec_ipython_client/plugins/flomni/flomni.py
+++ b/csaxs_bec/bec_ipython_client/plugins/flomni/flomni.py
@@ -2184,6 +2184,18 @@ class Flomni(
 
     @single_point_instead_of_fermat_scan.setter
     def single_point_instead_of_fermat_scan(self, val: bool):
+        # Fire the reminder right at the moment it's switched on, not just
+        # when tomo_parameters() happens to be called afterward. Gated on
+        # the off->on transition (reading the property itself for the old
+        # value, before the write below) so restoring the same True value
+        # across consecutive queued jobs doesn't reprint it every time.
+        if val and not self.single_point_instead_of_fermat_scan:
+            print(
+                "\x1b[93mNote: with single-point mode on, acquire a single projection "
+                "(including inside a custom at_each_angle hook) with "
+                "tomo_acquire_at_angle(angle), not tomo_scan_projection(angle) -- the "
+                "latter always runs a full Fermat scan regardless of this setting.\x1b[0m"
+            )
         self.client.set_global_var("single_point_instead_of_fermat_scan", val)
 
     @property