diff --git a/src/mame/layout/linn_linndrum.lay b/src/mame/layout/linn_linndrum.lay
index d3b61814a48..ede9314f83e 100644
--- a/src/mame/layout/linn_linndrum.lay
+++ b/src/mame/layout/linn_linndrum.lay
@@ -257,6 +257,12 @@ copyright-holders:m1macrophage
 		<element ref="display_digit" name="~display_output~1"><bounds x="44" y="5" width="30" height="38"/></element>
 	</group>
 
+	<element name="script_warning" defstate="1">
+		<text state="1" string="*** to control sliders and knobs with a mouse, enable the layout plugin ***">
+			<color red="0.82" green="0.43" blue="0.31"/>
+		</text>
+	</element>
+
 	<view name="Default Layout">
 		<bounds x="53" y="49" width="2113" height="1112"/>
 
@@ -268,6 +274,9 @@ copyright-holders:m1macrophage
 		<element ref="wood"><bounds x="2092" y="50" width="72" height="1104"/></element>
 		<element ref="dark_line"><bounds x="160" y="283" width="1897" height="3"/></element>
 		<element ref="dark_line"><bounds x="160" y="321" width="1897" height="3"/></element>
+		<collection name="script warning">
+			<element ref="script_warning" id="warning"><bounds x="160" y="355" width="1897" height="30"/></element>
+		</collection>
 
 		<!-- I/O -->
 		<element ref="jack"><bounds x="655" y="64" width="18" height="6"/></element>
@@ -610,6 +619,8 @@ copyright-holders:m1macrophage
 					local gain_input = "pot_gain_" .. i
 					add_vertical_slider(view, "slider_" .. gain_input, "slider_knob_" .. gain_input, gain_input)
 				end
+
+				view.items["warning"]:set_state(0)
 			end)
 
 		-----------------------------------------------------------------------
diff --git a/src/mame/layout/oberheim_dmx.lay b/src/mame/layout/oberheim_dmx.lay
index d4a8aaeb4d9..95a6f98764f 100644
--- a/src/mame/layout/oberheim_dmx.lay
+++ b/src/mame/layout/oberheim_dmx.lay
@@ -133,6 +133,12 @@ copyright-holders:m1macrophage
 		</element>
 	</group>
 
+	<element name="script_warning" defstate="1">
+		<text state="1" string="To control sliders and knobs with a mouse, enable the layout plugin.">
+			<color red="0.65" green="0.65" blue="0.65"/>
+		</text>
+	</element>
+
 	<element name="text-tune">
 		<text string="TUNE:"><color red="0.8" green="0.8" blue="0.8"/></text>
 	</element>
@@ -368,6 +374,11 @@ copyright-holders:m1macrophage
 				</group>
 			</repeat>
 		</collection>
+		<collection name="script warning">
+			<element ref="script_warning" id="warning">
+				<bounds x="600" y="105" width="300" height="20"/>
+			</element>
+		</collection>
 
 		<!-- Mixer -->
 		<repeat count="9">
@@ -553,6 +564,8 @@ copyright-holders:m1macrophage
 				for i = 1, 8 do
 					add_vertical_slider(view, "trimmer_" .. i, "trimmer_knob_" .. i, "pitch_adj_" .. i)
 				end
+
+				view.items["warning"]:set_state(0)
 			end)
 
 		-----------------------------------------------------------------------