diff --git a/doc/reference/evolution-util/evolution-util-sections.txt b/doc/reference/evolution-util/evolution-util-sections.txt
index d73f89d450..11116d29db 100644
--- a/doc/reference/evolution-util/evolution-util-sections.txt
+++ b/doc/reference/evolution-util/evolution-util-sections.txt
@@ -4273,8 +4273,11 @@ e_source_selector_set_show_toggles
 e_source_selector_select_source
 e_source_selector_unselect_source
 e_source_selector_select_exclusive
+e_source_selector_select_all
 e_source_selector_source_is_selected
 e_source_selector_get_selection
+e_source_selector_count_total
+e_source_selector_count_selected
 e_source_selector_edit_primary_selection
 e_source_selector_ref_primary_selection
 e_source_selector_set_primary_selection
diff --git a/e-util/e-source-selector.c b/e-util/e-source-selector.c
index b8dab711dd..a32dc16037 100644
--- a/e-util/e-source-selector.c
+++ b/e-util/e-source-selector.c
@@ -2237,6 +2237,93 @@ e_source_selector_get_selection (ESourceSelector *selector)
 	return g_queue_peek_head_link (&closure.queue);
 }
 
+struct CountData {
+	ESourceSelector *selector;
+	guint count;
+	gboolean selected;
+};
+
+static gboolean
+source_selector_count_sources (GtkTreeModel *model,
+			       GtkTreePath *path,
+			       GtkTreeIter *iter,
+			       gpointer user_data)
+{
+	struct CountData *cd = user_data;
+	ESource *source;
+
+	gtk_tree_model_get (model, iter, COLUMN_SOURCE, &source, -1);
+
+	if (e_source_has_extension (source, e_source_selector_get_extension_name (cd->selector))) {
+		if (cd->selected) {
+			if (e_source_selector_source_is_selected (cd->selector, source))
+				cd->count++;
+		} else {
+			cd->count++;
+		}
+	}
+
+	g_object_unref (source);
+
+	return FALSE;
+}
+
+/**
+ * e_source_selector_count_total:
+ * @selector: an #ESourceSelector
+ *
+ * Counts how many ESource-s are shown in the @selector.
+ *
+ * Returns: How many ESource-s are shown in the @selector.
+ *
+ * Since: 3.20
+ **/
+guint
+e_source_selector_count_total (ESourceSelector *selector)
+{
+	struct CountData cd;
+
+	g_return_val_if_fail (E_IS_SOURCE_SELECTOR (selector), 0);
+
+	cd.selector = selector;
+	cd.count = 0;
+	cd.selected = FALSE;
+
+	gtk_tree_model_foreach (
+		gtk_tree_view_get_model (GTK_TREE_VIEW (selector)),
+		source_selector_count_sources, &cd);
+
+	return cd.count;
+}
+
+/**
+ * e_source_selector_count_selected:
+ * @selector: an #ESourceSelector
+ *
+ * Counts how many ESource-s are selected in the @selector.
+ *
+ * Returns: How many ESource-s are selected in the @selector.
+ *
+ * Since: 3.20
+ **/
+guint
+e_source_selector_count_selected (ESourceSelector *selector)
+{
+	struct CountData cd;
+
+	g_return_val_if_fail (E_IS_SOURCE_SELECTOR (selector), 0);
+
+	cd.selector = selector;
+	cd.count = 0;
+	cd.selected = TRUE;
+
+	gtk_tree_model_foreach (
+		gtk_tree_view_get_model (GTK_TREE_VIEW (selector)),
+		source_selector_count_sources, &cd);
+
+	return cd.count;
+}
+
 /**
  * e_source_selector_select_source:
  * @selector: An #ESourceSelector widget
@@ -2349,6 +2436,42 @@ e_source_selector_select_exclusive (ESourceSelector *selector,
 		g_signal_emit (selector, signals[SELECTION_CHANGED], 0);
 }
 
+/**
+ * e_source_selector_select_all:
+ * @selector: An #ESourceSelector widget
+ *
+ * Selects all ESource-s in the @selector.
+ *
+ * Since: 3.20
+ **/
+void
+e_source_selector_select_all (ESourceSelector *selector)
+{
+	ESourceSelectorClass *class;
+	GHashTable *source_index;
+	GHashTableIter iter;
+	gpointer key;
+	gboolean any_changed = FALSE;
+
+	g_return_if_fail (E_IS_SOURCE_SELECTOR (selector));
+
+	class = E_SOURCE_SELECTOR_GET_CLASS (selector);
+	g_return_if_fail (class->set_source_selected != NULL);
+
+	source_index = selector->priv->source_index;
+	g_hash_table_iter_init (&iter, source_index);
+
+	while (g_hash_table_iter_next (&iter, &key, NULL)) {
+		if (class->set_source_selected (selector, key, TRUE)) {
+			any_changed = TRUE;
+			g_signal_emit (selector, signals[SOURCE_SELECTED], 0, key);
+		}
+	}
+
+	if (any_changed)
+		g_signal_emit (selector, signals[SELECTION_CHANGED], 0);
+}
+
 /**
  * e_source_selector_source_is_selected:
  * @selector: An #ESourceSelector widget
diff --git a/e-util/e-source-selector.h b/e-util/e-source-selector.h
index afccfa62e6..776ccce303 100644
--- a/e-util/e-source-selector.h
+++ b/e-util/e-source-selector.h
@@ -122,10 +122,13 @@ void		e_source_selector_unselect_source
 void		e_source_selector_select_exclusive
 						(ESourceSelector *selector,
 						 ESource *source);
+void		e_source_selector_select_all	(ESourceSelector *selector);
 gboolean	e_source_selector_source_is_selected
 						(ESourceSelector *selector,
 						 ESource *source);
 GList *		e_source_selector_get_selection	(ESourceSelector *selector);
+guint		e_source_selector_count_total	(ESourceSelector *selector);
+guint		e_source_selector_count_selected(ESourceSelector *selector);
 void		e_source_selector_edit_primary_selection
 						(ESourceSelector *selector);
 ESource *	e_source_selector_ref_primary_selection
diff --git a/modules/calendar/e-cal-base-shell-sidebar.c b/modules/calendar/e-cal-base-shell-sidebar.c
index d3ce3e17b5..dc81a7e262 100644
--- a/modules/calendar/e-cal-base-shell-sidebar.c
+++ b/modules/calendar/e-cal-base-shell-sidebar.c
@@ -215,6 +215,8 @@ cal_base_shell_sidebar_check_state (EShellSidebar *shell_sidebar)
 		g_object_unref (source);
 	}
 
+	if (e_source_selector_count_total (selector) == e_source_selector_count_selected (selector))
+		state |= E_CAL_BASE_SHELL_SIDEBAR_ALL_SOURCES_SELECTED;
 	if (has_primary_source)
 		state |= E_CAL_BASE_SHELL_SIDEBAR_HAS_PRIMARY_SOURCE;
 	if (is_writable)
diff --git a/modules/calendar/e-cal-base-shell-sidebar.h b/modules/calendar/e-cal-base-shell-sidebar.h
index 6ef73fc11d..e33746f0e2 100644
--- a/modules/calendar/e-cal-base-shell-sidebar.h
+++ b/modules/calendar/e-cal-base-shell-sidebar.h
@@ -56,7 +56,8 @@ enum {
 	E_CAL_BASE_SHELL_SIDEBAR_PRIMARY_SOURCE_IS_REMOTE_CREATABLE = 1 << 3,
 	E_CAL_BASE_SHELL_SIDEBAR_PRIMARY_SOURCE_IS_REMOTE_DELETABLE = 1 << 4,
 	E_CAL_BASE_SHELL_SIDEBAR_PRIMARY_SOURCE_IN_COLLECTION = 1 << 5,
-	E_CAL_BASE_SHELL_SIDEBAR_SOURCE_SUPPORTS_REFRESH = 1 << 6
+	E_CAL_BASE_SHELL_SIDEBAR_SOURCE_SUPPORTS_REFRESH = 1 << 6,
+	E_CAL_BASE_SHELL_SIDEBAR_ALL_SOURCES_SELECTED = 1 << 7
 };
 
 struct _ECalBaseShellSidebar {
diff --git a/modules/calendar/e-cal-shell-view-actions.c b/modules/calendar/e-cal-shell-view-actions.c
index adac44842d..bc40565550 100644
--- a/modules/calendar/e-cal-shell-view-actions.c
+++ b/modules/calendar/e-cal-shell-view-actions.c
@@ -423,6 +423,19 @@ action_calendar_search_stop_cb (GtkAction *action,
 	e_cal_shell_view_search_stop (cal_shell_view);
 }
 
+static void
+action_calendar_select_all_cb (GtkAction *action,
+			       ECalShellView *cal_shell_view)
+{
+	ECalBaseShellSidebar *cal_shell_sidebar;
+	ESourceSelector *selector;
+
+	cal_shell_sidebar = cal_shell_view->priv->cal_shell_sidebar;
+	selector = e_cal_base_shell_sidebar_get_selector (cal_shell_sidebar);
+
+	e_source_selector_select_all (selector);
+}
+
 static void
 action_calendar_select_one_cb (GtkAction *action,
                                ECalShellView *cal_shell_view)
@@ -1309,6 +1322,13 @@ static GtkActionEntry calendar_entries[] = {
 	  N_("Stop currently running search"),
 	  G_CALLBACK (action_calendar_search_stop_cb) },
 
+	{ "calendar-select-all",
+	  "stock_check-filled",
+	  N_("Sho_w All Calendars"),
+	  NULL,
+	  NULL,  /* XXX Add a tooltip! */
+	  G_CALLBACK (action_calendar_select_all_cb) },
+
 	{ "calendar-select-one",
 	  "stock_check-filled",
 	  N_("Show _Only This Calendar"),
@@ -1483,6 +1503,10 @@ static EPopupActionEntry calendar_popup_entries[] = {
 	  NULL,
 	  "calendar-rename" },
 
+	{ "calendar-popup-select-all",
+	  NULL,
+	  "calendar-select-all" },
+
 	{ "calendar-popup-select-one",
 	  NULL,
 	  "calendar-select-one" },
diff --git a/modules/calendar/e-cal-shell-view-actions.h b/modules/calendar/e-cal-shell-view-actions.h
index 4549845f2d..cef460bf05 100644
--- a/modules/calendar/e-cal-shell-view-actions.h
+++ b/modules/calendar/e-cal-shell-view-actions.h
@@ -56,6 +56,8 @@
 	E_SHELL_WINDOW_ACTION ((window), "calendar-search-next")
 #define E_SHELL_WINDOW_ACTION_CALENDAR_SEARCH_STOP(window) \
 	E_SHELL_WINDOW_ACTION ((window), "calendar-search-stop")
+#define E_SHELL_WINDOW_ACTION_CALENDAR_SELECT_ALL(window) \
+	E_SHELL_WINDOW_ACTION ((window), "calendar-select-all")
 #define E_SHELL_WINDOW_ACTION_CALENDAR_SELECT_ONE(window) \
 	E_SHELL_WINDOW_ACTION ((window), "calendar-select-one")
 #define E_SHELL_WINDOW_ACTION_CALENDAR_VIEW_DAY(window) \
diff --git a/modules/calendar/e-cal-shell-view.c b/modules/calendar/e-cal-shell-view.c
index bf29efc47e..139dc2306c 100644
--- a/modules/calendar/e-cal-shell-view.c
+++ b/modules/calendar/e-cal-shell-view.c
@@ -285,6 +285,7 @@ cal_shell_view_update_actions (EShellView *shell_view)
 	gboolean selection_can_delegate;
 	gboolean single_event_selected;
 	gboolean refresh_supported;
+	gboolean all_sources_selected;
 
 	/* Chain up to parent's update_actions() method. */
 	E_SHELL_VIEW_CLASS (e_cal_shell_view_parent_class)->
@@ -347,9 +348,15 @@ cal_shell_view_update_actions (EShellView *shell_view)
 		(state & E_CAL_BASE_SHELL_SIDEBAR_PRIMARY_SOURCE_IN_COLLECTION);
 	refresh_supported =
 		(state & E_CAL_BASE_SHELL_SIDEBAR_SOURCE_SUPPORTS_REFRESH);
+	all_sources_selected =
+		(state & E_CAL_BASE_SHELL_SIDEBAR_ALL_SOURCES_SELECTED) != 0;
 
 	any_events_selected = (single_event_selected || multiple_events_selected);
 
+	action = ACTION (CALENDAR_SELECT_ALL);
+	sensitive = !all_sources_selected;
+	gtk_action_set_sensitive (action, sensitive);
+
 	action = ACTION (CALENDAR_COPY);
 	sensitive = has_primary_source;
 	gtk_action_set_sensitive (action, sensitive);
diff --git a/modules/calendar/e-memo-shell-view-actions.c b/modules/calendar/e-memo-shell-view-actions.c
index 7f40de14cf..c883b4d728 100644
--- a/modules/calendar/e-memo-shell-view-actions.c
+++ b/modules/calendar/e-memo-shell-view-actions.c
@@ -297,6 +297,19 @@ action_memo_list_rename_cb (GtkAction *action,
 	e_source_selector_edit_primary_selection (selector);
 }
 
+static void
+action_memo_list_select_all_cb (GtkAction *action,
+				EMemoShellView *memo_shell_view)
+{
+	ECalBaseShellSidebar *memo_shell_sidebar;
+	ESourceSelector *selector;
+
+	memo_shell_sidebar = memo_shell_view->priv->memo_shell_sidebar;
+	selector = e_cal_base_shell_sidebar_get_selector (memo_shell_sidebar);
+
+	e_source_selector_select_all (selector);
+}
+
 static void
 action_memo_list_select_one_cb (GtkAction *action,
                                 EMemoShellView *memo_shell_view)
@@ -617,6 +630,13 @@ static GtkActionEntry memo_entries[] = {
 	  NULL,  /* XXX Add a tooltip! */
 	  G_CALLBACK (action_memo_list_select_one_cb) },
 
+	{ "memo-list-select-all",
+	  "stock_check-filled",
+	  N_("Sho_w All Memo Lists"),
+	  NULL,
+	  NULL,  /* XXX Add a tooltip! */
+	  G_CALLBACK (action_memo_list_select_all_cb) },
+
 	{ "memo-new",
 	  "stock_insert-note",
 	  N_("New _Memo"),
@@ -674,6 +694,10 @@ static EPopupActionEntry memo_popup_entries[] = {
 	  NULL,
 	  "memo-list-rename" },
 
+	{ "memo-list-popup-select-all",
+	  NULL,
+	  "memo-list-select-all" },
+
 	{ "memo-list-popup-select-one",
 	  NULL,
 	  "memo-list-select-one" },
diff --git a/modules/calendar/e-memo-shell-view-actions.h b/modules/calendar/e-memo-shell-view-actions.h
index 572cfa93cc..e71a81c574 100644
--- a/modules/calendar/e-memo-shell-view-actions.h
+++ b/modules/calendar/e-memo-shell-view-actions.h
@@ -64,6 +64,8 @@
 	E_SHELL_WINDOW_ACTION ((window), "memo-list-refresh")
 #define E_SHELL_WINDOW_ACTION_MEMO_LIST_RENAME(window) \
 	E_SHELL_WINDOW_ACTION ((window), "memo-list-rename")
+#define E_SHELL_WINDOW_ACTION_MEMO_LIST_SELECT_ALL(window) \
+	E_SHELL_WINDOW_ACTION ((window), "memo-list-select-all")
 #define E_SHELL_WINDOW_ACTION_MEMO_LIST_SELECT_ONE(window) \
 	E_SHELL_WINDOW_ACTION ((window), "memo-list-select-one")
 
diff --git a/modules/calendar/e-memo-shell-view.c b/modules/calendar/e-memo-shell-view.c
index 479d20d6ca..1804e6bf86 100644
--- a/modules/calendar/e-memo-shell-view.c
+++ b/modules/calendar/e-memo-shell-view.c
@@ -168,6 +168,7 @@ memo_shell_view_update_actions (EShellView *shell_view)
 	gboolean single_memo_selected;
 	gboolean sources_are_editable;
 	gboolean refresh_supported;
+	gboolean all_sources_selected;
 
 	/* Chain up to parent's update_actions() method. */
 	E_SHELL_VIEW_CLASS (e_memo_shell_view_parent_class)->
@@ -202,9 +203,15 @@ memo_shell_view_update_actions (EShellView *shell_view)
 		(state & E_CAL_BASE_SHELL_SIDEBAR_PRIMARY_SOURCE_IN_COLLECTION);
 	refresh_supported =
 		(state & E_CAL_BASE_SHELL_SIDEBAR_SOURCE_SUPPORTS_REFRESH);
+	all_sources_selected =
+		(state & E_CAL_BASE_SHELL_SIDEBAR_ALL_SOURCES_SELECTED) != 0;
 
 	any_memos_selected = (single_memo_selected || multiple_memos_selected);
 
+	action = ACTION (MEMO_LIST_SELECT_ALL);
+	sensitive = !all_sources_selected;
+	gtk_action_set_sensitive (action, sensitive);
+
 	action = ACTION (MEMO_DELETE);
 	sensitive = any_memos_selected && sources_are_editable;
 	gtk_action_set_sensitive (action, sensitive);
diff --git a/modules/calendar/e-task-shell-view-actions.c b/modules/calendar/e-task-shell-view-actions.c
index 29f871811f..d7bc023778 100644
--- a/modules/calendar/e-task-shell-view-actions.c
+++ b/modules/calendar/e-task-shell-view-actions.c
@@ -321,6 +321,19 @@ action_task_list_rename_cb (GtkAction *action,
 	e_source_selector_edit_primary_selection (selector);
 }
 
+static void
+action_task_list_select_all_cb (GtkAction *action,
+				ETaskShellView *task_shell_view)
+{
+	ECalBaseShellSidebar *task_shell_sidebar;
+	ESourceSelector *selector;
+
+	task_shell_sidebar = task_shell_view->priv->task_shell_sidebar;
+	selector = e_cal_base_shell_sidebar_get_selector (task_shell_sidebar);
+
+	e_source_selector_select_all (selector);
+}
+
 static void
 action_task_list_select_one_cb (GtkAction *action,
                                 ETaskShellView *task_shell_view)
@@ -736,6 +749,13 @@ static GtkActionEntry task_entries[] = {
 	  N_("Rename the selected task list"),
 	  G_CALLBACK (action_task_list_rename_cb) },
 
+	{ "task-list-select-all",
+	  "stock_check-filled",
+	  N_("Sho_w All Task Lists"),
+	  NULL,
+	  NULL,  /* XXX Add a tooltip! */
+	  G_CALLBACK (action_task_list_select_all_cb) },
+
 	{ "task-list-select-one",
 	  "stock_check-filled",
 	  N_("Show _Only This Task List"),
@@ -828,6 +848,10 @@ static EPopupActionEntry task_popup_entries[] = {
 	  NULL,
 	  "task-list-rename" },
 
+	{ "task-list-popup-select-all",
+	  NULL,
+	  "task-list-select-all" },
+
 	{ "task-list-popup-select-one",
 	  NULL,
 	  "task-list-select-one" },
diff --git a/modules/calendar/e-task-shell-view-actions.h b/modules/calendar/e-task-shell-view-actions.h
index 81a0f7c7e8..f8097e8f7f 100644
--- a/modules/calendar/e-task-shell-view-actions.h
+++ b/modules/calendar/e-task-shell-view-actions.h
@@ -72,6 +72,8 @@
 	E_SHELL_WINDOW_ACTION ((window), "task-list-refresh")
 #define E_SHELL_WINDOW_ACTION_TASK_LIST_RENAME(window) \
 	E_SHELL_WINDOW_ACTION ((window), "task-list-rename")
+#define E_SHELL_WINDOW_ACTION_TASK_LIST_SELECT_ALL(window) \
+	E_SHELL_WINDOW_ACTION ((window), "task-list-select-all")
 #define E_SHELL_WINDOW_ACTION_TASK_LIST_SELECT_ONE(window) \
 	E_SHELL_WINDOW_ACTION ((window), "task-list-select-one")
 
diff --git a/modules/calendar/e-task-shell-view.c b/modules/calendar/e-task-shell-view.c
index e267b5c046..c731b1fcfb 100644
--- a/modules/calendar/e-task-shell-view.c
+++ b/modules/calendar/e-task-shell-view.c
@@ -261,6 +261,7 @@ task_shell_view_update_actions (EShellView *shell_view)
 	gboolean some_tasks_incomplete;
 	gboolean sources_are_editable;
 	gboolean refresh_supported;
+	gboolean all_sources_selected;
 
 	/* Chain up to parent's update_actions() method. */
 	E_SHELL_VIEW_CLASS (e_task_shell_view_parent_class)->update_actions (shell_view);
@@ -300,9 +301,15 @@ task_shell_view_update_actions (EShellView *shell_view)
 		(state & E_CAL_BASE_SHELL_SIDEBAR_PRIMARY_SOURCE_IN_COLLECTION);
 	refresh_supported =
 		(state & E_CAL_BASE_SHELL_SIDEBAR_SOURCE_SUPPORTS_REFRESH);
+	all_sources_selected =
+		(state & E_CAL_BASE_SHELL_SIDEBAR_ALL_SOURCES_SELECTED) != 0;
 
 	any_tasks_selected = (single_task_selected || multiple_tasks_selected);
 
+	action = ACTION (TASK_LIST_SELECT_ALL);
+	sensitive = !all_sources_selected;
+	gtk_action_set_sensitive (action, sensitive);
+
 	action = ACTION (TASK_ASSIGN);
 	sensitive =
 		single_task_selected && sources_are_editable &&
diff --git a/ui/evolution-calendars.ui b/ui/evolution-calendars.ui
index f9978d116b..bef4b85e63 100644
--- a/ui/evolution-calendars.ui
+++ b/ui/evolution-calendars.ui
@@ -68,6 +68,7 @@
     <separator/>
     <menuitem action='calendar-popup-delete'/>
     <menuitem action='calendar-popup-select-one'/>
+    <menuitem action='calendar-popup-select-all'/>
     <placeholder name='calendar-popup-actions'/>
     <separator/>
     <menuitem action='calendar-popup-manage-groups'/>
diff --git a/ui/evolution-memos.ui b/ui/evolution-memos.ui
index 2f34206a32..0a2c3d8e74 100644
--- a/ui/evolution-memos.ui
+++ b/ui/evolution-memos.ui
@@ -65,6 +65,7 @@
     <separator/>
     <menuitem action='memo-list-popup-delete'/>
     <menuitem action='memo-list-popup-select-one'/>
+    <menuitem action='memo-list-popup-select-all'/>
     <placeholder name='memo-list-popup-actions'/>
     <separator/>
     <menuitem action='memo-list-popup-manage-groups'/>
diff --git a/ui/evolution-tasks.ui b/ui/evolution-tasks.ui
index 2fc2d01be8..acef77f4ad 100644
--- a/ui/evolution-tasks.ui
+++ b/ui/evolution-tasks.ui
@@ -78,6 +78,7 @@
     <separator/>
     <menuitem action='task-list-popup-delete'/>
     <menuitem action='task-list-popup-select-one'/>
+    <menuitem action='task-list-popup-select-all'/>
     <placeholder name='task-list-popup-actions'/>
     <separator/>
     <menuitem action='task-list-popup-manage-groups'/>