diff --git a/src/data/ui/SchedulePage.ui b/src/data/ui/SchedulePage.ui
index af214ae..f2a7eee 100644
--- a/src/data/ui/SchedulePage.ui
+++ b/src/data/ui/SchedulePage.ui
@@ -60,6 +60,7 @@ SPDX-License-Identifier: GPL-3.0-or-later
         <child>
           <object class="AdwExpanderRow" id="nightlight_expander_row">
             <property name="title" translatable="yes">Night Light</property>
+            <property name="subtitle" translatable="yes">These settings only apply when Night Light is the time source.</property>
             <child>
               <object class="AdwActionRow">
                 <property name="title" translatable="yes"><![CDATA[Follow <i>Disable until tomorrow</i>]]></property>
@@ -77,6 +78,7 @@ SPDX-License-Identifier: GPL-3.0-or-later
         <child>
           <object class="AdwExpanderRow">
             <property name="title" translatable="yes">Manual schedule</property>
+            <property name="subtitle" translatable="yes">These settings only apply when using the manual schedule as the time source.</property>
             <child>
               <object class="AdwActionRow">
                 <property name="title" translatable="yes">Sunrise</property>
@@ -106,6 +108,7 @@ SPDX-License-Identifier: GPL-3.0-or-later
         <child>
           <object class="AdwExpanderRow">
             <property name="title" translatable="yes">On-demand</property>
+            <property name="subtitle" translatable="yes">These settings only apply when using the on-demand time source.</property>
             <child>
               <object class="AdwActionRow">
                 <property name="title" translatable="yes">Keyboard shortcut</property>
diff --git a/src/po/nightthemeswitcher@romainvigier.fr.pot b/src/po/nightthemeswitcher@romainvigier.fr.pot
index 7a5050b..6c2a552 100644
--- a/src/po/nightthemeswitcher@romainvigier.fr.pot
+++ b/src/po/nightthemeswitcher@romainvigier.fr.pot
@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: nightthemeswitcher@romainvigier.fr\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-04-04 13:15+0200\n"
+"POT-Creation-Date: 2022-04-05 11:41+0200\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -270,7 +270,7 @@ msgstr ""
 msgid "Run commands"
 msgstr ""
 
-#: src/data/ui/CommandsPage.ui:21 src/data/ui/SchedulePage.ui:82
+#: src/data/ui/CommandsPage.ui:21 src/data/ui/SchedulePage.ui:84
 msgid "Sunrise"
 msgstr ""
 
@@ -279,7 +279,7 @@ msgstr ""
 msgid "notify-send \"Hello sunshine!\""
 msgstr ""
 
-#: src/data/ui/CommandsPage.ui:35 src/data/ui/SchedulePage.ui:94
+#: src/data/ui/CommandsPage.ui:35 src/data/ui/SchedulePage.ui:96
 msgid "Sunset"
 msgstr ""
 
@@ -339,29 +339,42 @@ msgstr ""
 msgid "Night Light"
 msgstr ""
 
-#: src/data/ui/SchedulePage.ui:65
-msgid "Follow <i>Disable until tomorrow</i>"
+#: src/data/ui/SchedulePage.ui:63
+msgid "These settings only apply when Night Light is the time source."
 msgstr ""
 
 #: src/data/ui/SchedulePage.ui:66
+msgid "Follow <i>Disable until tomorrow</i>"
+msgstr ""
+
+#: src/data/ui/SchedulePage.ui:67
 msgid ""
 "When Night Light is temporarily disabled, the extension will switch to day "
 "variants."
 msgstr ""
 
-#: src/data/ui/SchedulePage.ui:79 src/preferences/SchedulePage.js:56
+#: src/data/ui/SchedulePage.ui:80 src/preferences/SchedulePage.js:56
 msgid "Manual schedule"
 msgstr ""
 
-#: src/data/ui/SchedulePage.ui:108 src/preferences/SchedulePage.js:57
+#: src/data/ui/SchedulePage.ui:81
+msgid ""
+"These settings only apply when using the manual schedule as the time source."
+msgstr ""
+
+#: src/data/ui/SchedulePage.ui:110 src/preferences/SchedulePage.js:57
 msgid "On-demand"
 msgstr ""
 
 #: src/data/ui/SchedulePage.ui:111
+msgid "These settings only apply when using the on-demand time source."
+msgstr ""
+
+#: src/data/ui/SchedulePage.ui:114
 msgid "Keyboard shortcut"
 msgstr ""
 
-#: src/data/ui/SchedulePage.ui:122
+#: src/data/ui/SchedulePage.ui:125
 msgid "Button location"
 msgstr ""
 
@@ -424,31 +437,31 @@ msgstr ""
 msgid ":"
 msgstr ""
 
-#: src/modules/TimerOndemand.js:213
+#: src/modules/TimerOndemand.js:212
 msgid "Turn Night Mode Off"
 msgstr ""
 
-#: src/modules/TimerOndemand.js:213
+#: src/modules/TimerOndemand.js:212
 msgid "Turn Night Mode On"
 msgstr ""
 
-#: src/modules/TimerOndemand.js:228
+#: src/modules/TimerOndemand.js:227
 msgid "Extension Settings"
 msgstr ""
 
-#: src/modules/TimerOndemand.js:237
+#: src/modules/TimerOndemand.js:235
 msgid "Night Mode Off"
 msgstr ""
 
-#: src/modules/TimerOndemand.js:237
+#: src/modules/TimerOndemand.js:235
 msgid "Night Mode On"
 msgstr ""
 
-#: src/modules/TimerOndemand.js:238
+#: src/modules/TimerOndemand.js:236
 msgid "Turn Off"
 msgstr ""
 
-#: src/modules/TimerOndemand.js:238
+#: src/modules/TimerOndemand.js:236
 msgid "Turn On"
 msgstr ""