diff --git a/src/Definitions.h b/src/Definitions.h
index dc61706..8321180 100644
--- a/src/Definitions.h
+++ b/src/Definitions.h
@@ -114,6 +114,12 @@ namespace ts {
         CHANNELCONVERSATIONMODE_NONE = 2
     };
 
+    enum ChannelSidebarMode : uint8_t {
+        CHANNELSIDEBARMODE_CONVERSATION = 0,
+        CHANNELSIDEBARMODE_DESCRIPTION = 1,
+        CHANNELSIDEBARMODE_FILE_TRANSFER = 2
+    };
+
     enum QueryEventGroup : int {
         QEVENTGROUP_MIN                 = 0,
         QEVENTGROUP_SERVER              = 0,
@@ -174,6 +180,7 @@ DEFINE_TRANSFORMS(ts::PluginTargetMode, uint8_t);
 DEFINE_TRANSFORMS(ts::ViewReasonId, uint8_t);
 DEFINE_TRANSFORMS(ts::ChatMessageMode, uint8_t);
 DEFINE_TRANSFORMS(ts::ChannelConversationMode, uint8_t);
+DEFINE_TRANSFORMS(ts::ChannelSidebarMode, uint8_t);
 
 #ifdef WIN32
 #define ts_always_inline __forceinline
diff --git a/src/PermissionManager.h b/src/PermissionManager.h
index 9b81be8..3980f01 100644
--- a/src/PermissionManager.h
+++ b/src/PermissionManager.h
@@ -178,6 +178,7 @@ namespace ts {
             b_channel_create_modify_conversation_mode_private,
             b_channel_create_modify_conversation_mode_public,
             b_channel_create_modify_conversation_mode_none,
+            b_channel_create_modify_sidebar_mode,
 
             /* channel::modify */
             b_channel_modify_parent,
diff --git a/src/Properties.h b/src/Properties.h
index 7d49c79..ae8926f 100644
--- a/src/Properties.h
+++ b/src/Properties.h
@@ -282,6 +282,8 @@ namespace ts {
             CHANNEL_CONVERSATION_HISTORY_LENGTH,
             CHANNEL_CONVERSATION_MODE,
 
+            CHANNEL_SIDEBAR_MODE,
+
             CHANNEL_ENDMARKER
         };
 
diff --git a/src/PropertyDefinition.h b/src/PropertyDefinition.h
index d3075ed..3c0f45f 100644
--- a/src/PropertyDefinition.h
+++ b/src/PropertyDefinition.h
@@ -150,6 +150,7 @@ property_list = std::array<PropertyDescription, impl::property_count()>{
     PropertyDescription{CHANNEL_CREATED_BY, "channel_created_by", "0", TYPE_UNSIGNED_NUMBER, FLAG_SS | FLAG_CHANNEL_VIEW | FLAG_CHANNEL_VARIABLE | FLAG_NEW},                   //Available for all channels that are "in view", always up-to-date
     PropertyDescription{CHANNEL_CONVERSATION_HISTORY_LENGTH, "channel_conversation_history_length", "1500", TYPE_SIGNED_NUMBER, FLAG_SS | FLAG_CHANNEL_VIEW | FLAG_CHANNEL_VARIABLE | FLAG_NEW | FLAG_USER_EDITABLE},
     PropertyDescription{CHANNEL_CONVERSATION_MODE, "channel_conversation_mode", "0", TYPE_UNSIGNED_NUMBER, FLAG_SS | FLAG_CHANNEL_VIEW | FLAG_CHANNEL_VARIABLE | FLAG_NEW | FLAG_USER_EDITABLE},
+    PropertyDescription{CHANNEL_SIDEBAR_MODE, "channel_sidebar_mode", "0", TYPE_UNSIGNED_NUMBER, FLAG_SS | FLAG_CHANNEL_VIEW | FLAG_CHANNEL_VARIABLE | FLAG_NEW | FLAG_USER_EDITABLE},
 
     /* group properties, this may gets removed */
     PropertyDescription{GROUP_UNDEFINED, "undefined", "", TYPE_UNKNOWN, 0},