diff --git a/cre.cpp b/cre.cpp
index 7ec155d21..bde307520 100644
--- a/cre.cpp
+++ b/cre.cpp
@@ -57,9 +57,25 @@ static int openDocument(lua_State *L) {
 	doc->text_view->LoadDocument(file_name);
 	doc->text_view->Render();
 
+	printf("gamma: %d\n", fontMan->GetGammaIndex());
+
 	return 1;
 }
 
+static int getGammaIndex(lua_State *L) {
+	lua_pushinteger(L, fontMan->GetGammaIndex());
+
+	return 1;
+}
+
+static int setGammaIndex(lua_State *L) {
+	int index = luaL_checkint(L, 1);
+
+	fontMan->SetGammaIndex(index);
+
+	return 0;
+}
+
 static int closeDocument(lua_State *L) {
 	CreDocument *doc = (CreDocument*) luaL_checkudata(L, 1, "credocument");
 	delete doc->text_view;
@@ -284,6 +300,8 @@ static int drawCurrentPage(lua_State *L) {
 static const struct luaL_Reg cre_func[] = {
 	{"openDocument", openDocument},
 	{"getFontFaces", getFontFaces},
+	{"getGammaIndex", getGammaIndex},
+	{"setGammaIndex", setGammaIndex},
 	{NULL, NULL}
 };
 
diff --git a/crereader.lua b/crereader.lua
index 55196c265..ba1d77e86 100644
--- a/crereader.lua
+++ b/crereader.lua
@@ -6,6 +6,7 @@ CREReader = UniReader:new{
 	pos = 0,
 	percent = 0,
 
+	gamma_index = 15,
 	font_face = nil,
 }
 
@@ -36,10 +37,15 @@ function CREReader:loadSpecialSettings()
 	local font_face = self.settings:readSetting("font_face")
 	self.font_face = font_face or "FreeSerif"
 	self.doc:setFontFace(self.font_face)
+
+	local gamma_index = self.settings:readSetting("gamma_index")
+	self.gamma_index = gamma_index or self.gamma_index
+	cre.setGammaIndex(self.gamma_index)
 end
 
 function CREReader:saveSpecialSettings()
 	self.settings:savesetting("font_face", self.font_face)
+	self.settings:savesetting("gamma_index", self.gamma_index)
 end
 
 function CREReader:getLastPageOrPos()
@@ -60,6 +66,7 @@ function CREReader:setzoom(page, preCache)
 end
 
 function CREReader:addJump(pos, notes)
+	return
 end
 
 function CREReader:goto(pos)
@@ -196,4 +203,20 @@ function CREReader:adjustCreReaderCommands()
 			cr:redrawCurrentPage()
 		end
 	)
+	self.commands:add(KEY_VPLUS, nil, "vol+",
+		"increase gamma",
+		function(cr)
+			cre.setGammaIndex(self.gamma_index + 1)
+			self.gamma_index = cre.getGammaIndex()
+			cr:redrawCurrentPage()
+		end
+	)
+	self.commands:add(KEY_VMINUS, nil, "vol-",
+		"decrease gamma",
+		function(cr)
+			cre.setGammaIndex(self.gamma_index - 1)
+			self.gamma_index = cre.getGammaIndex()
+			cr:redrawCurrentPage()
+		end
+	)
 end