diff --git a/rtdata/languages/Deutsch b/rtdata/languages/Deutsch
index 62869d142..d881a4025 100644
--- a/rtdata/languages/Deutsch
+++ b/rtdata/languages/Deutsch
@@ -873,17 +873,22 @@ TP_HSVEQUALIZER_NEUTRAL;Neutral
 TP_HSVEQUALIZER_SAT;S
 TP_HSVEQUALIZER_VAL;V
 TP_ICM_BLENDCMSMATRIX;Lichter aus Matrix einmischen
+TP_ICM_BLENDCMSMATRIX_TOOLTIP;Aktivieren um bei Verwendung von LUT-basierte ICC-Profilen Lichter wiederzustellen
 TP_ICM_FILEDLGFILTERANY;Alle Dateien
 TP_ICM_FILEDLGFILTERICM;ICC-Profildateien
-TP_ICM_GAMMABEFOREINPUT;Profil enthält Gamma-Anpassung
 TP_ICM_INPUTCAMERAICC;Kamera-Standard oder ICC
+TP_ICM_INPUTCAMERAICC_TOOLTIP;RawTherapee Standard ICC Farbprofil verwenden. Präsizer als einfache Matrix, aber nur für einige Kameras verfügbar.
 TP_ICM_INPUTCAMERA;Kamera-Standard
+TP_ICM_INPUTCAMERA_TOOLTIP;Einfache Standard Farbkorrektur-Matrix von DCRAW oder eingebettet im DNG verwenden
 TP_ICM_INPUTCUSTOM;Benutzerdefiniert
+TP_ICM_INPUTCUSTOM_TOOLTIP;Eigene ICC-Farbprofildatei für die Kamera verwenden
 TP_ICM_INPUTDLGLABEL;Wähle Eingabe-ICC-Profil...
 TP_ICM_INPUTEMBEDDED;Eingebettetes verwenden, falls möglich
+TP_ICM_INPUTEMBEDDED_TOOLTIP;Farbprofil verwenden, das ggf. in nicht-RAW Dateien eingebettet ist
 TP_ICM_INPUTNONE;Kein Profil
+TP_ICM_INPUTNONE_TOOLTIP;Kein Farbprofil verwenden. Nur in speziellen Fällen sinnvoll.
 TP_ICM_INPUTPROFILE;Eingabeprofil
-TP_ICM_LABEL;ICM
+TP_ICM_LABEL;Farbmanagement
 TP_ICM_NOICM;Kein ICM: sRGB-Ausgabe
 TP_ICM_OUTPUTDLGLABEL;Wähle Ausgabe-ICC-Profil...
 TP_ICM_OUTPUTPROFILE;Ausgabeprofil
diff --git a/rtdata/languages/default b/rtdata/languages/default
index 0b674fc2e..1be0fc94d 100644
--- a/rtdata/languages/default
+++ b/rtdata/languages/default
@@ -857,17 +857,22 @@ TP_HSVEQUALIZER_NEUTRAL;Neutral
 TP_HSVEQUALIZER_SAT;S
 TP_HSVEQUALIZER_VAL;V
 TP_ICM_BLENDCMSMATRIX;Blend highlights with matrix
+TP_ICM_BLENDCMSMATRIX_TOOLTIP;Enable to recover blown highlights when using LUT based ICC profiles
 TP_ICM_FILEDLGFILTERANY;Any files
 TP_ICM_FILEDLGFILTERICM;ICC Profile Files
-TP_ICM_GAMMABEFOREINPUT;Profile applies Gamma
 TP_ICM_INPUTCAMERA;Camera standard
+TP_ICM_INPUTCAMERA_TOOLTIP;Use simple default color matrix by DCRAW or embedded in DNG
 TP_ICM_INPUTCAMERAICC;Camera standard or ICC
+TP_ICM_INPUTCAMERAICC_TOOLTIP;Use RawTherapees default ICC color profile. More precise than simple matrix, but only available for some cameras.
 TP_ICM_INPUTCUSTOM;Custom
+TP_ICM_INPUTCUSTOM_TOOLTIP;Select your own ICC color profile file for the camera
 TP_ICM_INPUTDLGLABEL;Select Input ICC Profile...
 TP_ICM_INPUTEMBEDDED;Use Embedded, if possible
+TP_ICM_INPUTEMBEDDED_TOOLTIP;Use color profile embedded in non RAW files
 TP_ICM_INPUTNONE;No profile
+TP_ICM_INPUTNONE_TOOLTIP;Use no color profile at all. Use only in special cases.
 TP_ICM_INPUTPROFILE;Input Profile
-TP_ICM_LABEL;ICM
+TP_ICM_LABEL;Color Management
 TP_ICM_NOICM;No ICM: sRGB output
 TP_ICM_OUTPUTDLGLABEL;Select Output ICC Profile...
 TP_ICM_OUTPUTPROFILE;Output Profile
diff --git a/rtgui/icmpanel.cc b/rtgui/icmpanel.cc
index cee691c8c..ab4fe4b25 100644
--- a/rtgui/icmpanel.cc
+++ b/rtgui/icmpanel.cc
@@ -34,6 +34,7 @@ ICMPanel::ICMPanel () : Gtk::VBox(), FoldableToolPanel(this), iunchanged(NULL),
 //    set_border_width (4);
 
     ipDialog = Gtk::manage (new MyFileChooserButton (M("TP_ICM_INPUTDLGLABEL"), Gtk::FILE_CHOOSER_ACTION_OPEN));
+    ipDialog->set_tooltip_text (M("TP_ICM_INPUTCUSTOM_TOOLTIP"));
 
     Gtk::Label* ilab = Gtk::manage (new Gtk::Label ());
     ilab->set_alignment (0.0, 0.5);
@@ -41,19 +42,24 @@ ICMPanel::ICMPanel () : Gtk::VBox(), FoldableToolPanel(this), iunchanged(NULL),
     pack_start (*ilab, Gtk::PACK_SHRINK, 4);
     
     inone = Gtk::manage (new Gtk::RadioButton (M("TP_ICM_INPUTNONE")));
+    inone->set_tooltip_text (M("TP_ICM_INPUTNONE_TOOLTIP"));
     pack_start (*inone, Gtk::PACK_SHRINK, 4);
 
     iembedded = Gtk::manage (new Gtk::RadioButton (M("TP_ICM_INPUTEMBEDDED")));
+    iembedded->set_tooltip_text (M("TP_ICM_INPUTEMBEDDED_TOOLTIP"));
     pack_start (*iembedded, Gtk::PACK_SHRINK, 4);
 
     icamera = Gtk::manage (new Gtk::RadioButton (M("TP_ICM_INPUTCAMERA")));
+    icamera->set_tooltip_text (M("TP_ICM_INPUTCAMERA_TOOLTIP"));
     pack_start (*icamera, Gtk::PACK_SHRINK, 4);
 
     icameraICC = Gtk::manage (new Gtk::RadioButton (M("TP_ICM_INPUTCAMERAICC")));
+    icameraICC->set_tooltip_text (M("TP_ICM_INPUTCAMERAICC_TOOLTIP"));
     pack_start (*icameraICC, Gtk::PACK_SHRINK, 4);
 
     ifromfile = Gtk::manage (new Gtk::RadioButton (M("TP_ICM_INPUTCUSTOM")+":"));
     Gtk::HBox* ffbox = Gtk::manage (new Gtk::HBox ());
+    ifromfile->set_tooltip_text (M("TP_ICM_INPUTCUSTOM_TOOLTIP"));
     ffbox->pack_start (*ifromfile, Gtk::PACK_SHRINK);
     ffbox->pack_start (*ipDialog);
 
@@ -67,6 +73,7 @@ ICMPanel::ICMPanel () : Gtk::VBox(), FoldableToolPanel(this), iunchanged(NULL),
 
     ckbBlendCMSMatrix = Gtk::manage (new Gtk::CheckButton (M("TP_ICM_BLENDCMSMATRIX")));
     ckbBlendCMSMatrix->set_sensitive (false);
+    ckbBlendCMSMatrix->set_tooltip_text (M("TP_ICM_BLENDCMSMATRIX_TOOLTIP"));
     pack_start (*ckbBlendCMSMatrix, Gtk::PACK_SHRINK, 4);
 
     saveRef = Gtk::manage (new Gtk::Button (M("TP_ICM_SAVEREFERENCE")));