diff --git a/frontend/document/document.lua b/frontend/document/document.lua
index e21005a1a..9232a9c37 100644
--- a/frontend/document/document.lua
+++ b/frontend/document/document.lua
@@ -245,7 +245,7 @@ end
 function Document:hintPage(pageno, zoom, rotation, gamma, render_mode)
 	local hash_full_page = "renderpg|"..self.file.."|"..pageno.."|"..zoom.."|"..rotation.."|"..gamma.."|"..render_mode
 	if not Cache:check(hash_full_page) then
-		--DEBUG("hinting page", pageno)
+		DEBUG("hinting page", pageno)
 		self:renderPage(pageno, nil, zoom, rotation, gamma, render_mode)
 	end
 end
diff --git a/frontend/document/koptinterface.lua b/frontend/document/koptinterface.lua
index 7cf28404c..ec887959d 100644
--- a/frontend/document/koptinterface.lua
+++ b/frontend/document/koptinterface.lua
@@ -14,7 +14,7 @@ KoptOptions = {
 				name_text = "Screen Mode",
 				toggle = {"portrait", "landscape"},
 				args = {"portrait", "landscape"},
-				default_arg = Screen:getScreenMode(),
+				default_arg = "portrait",
 				current_func = function() return Screen:getScreenMode() end,
 				event = "SetScreenMode",
 			}
@@ -51,8 +51,8 @@ KoptOptions = {
 				name = "page_margin",
 				name_text = "Page Margin",
 				toggle = {"small", "medium", "large"},
-				values = {0.02, 0.06, 0.10},
-				default_value = 0.06,
+				values = {0.06, 0.10, 0.14},
+				default_value = 0.10,
 			},
 			{
 				name = "line_spacing",
@@ -92,11 +92,11 @@ KoptOptions = {
 		options = {
 			{
 				name = "font_size",
-				item_text = {"Aa","Aa","Aa","Aa","Aa","Aa","Aa","Aa","Aa","Aa"},
+				item_text = {"Aa","Aa","Aa","Aa","Aa","Aa","Aa","Aa","Aa","Aa","Aa"},
 				item_align_center = 1.0,
-				spacing = Screen:getWidth()*0.03,
-				item_font_size = {20,24,28,32,36,38,40,42,46,50},
-				values = {0.2, 0.3, 0.4, 0.6, 0.8, 1.0, 1.2, 1.6, 2.2, 2.8},
+				spacing = 15,
+				item_font_size = {20,24,28,32,34,36,38,40,42,44,46},
+				values = {0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 2.0, 4.0},
 				default_value = 1.0,
 			},
 		}
@@ -186,8 +186,9 @@ KoptOptions = {
 KoptInterface = {}
 
 -- get reflow context
-function KoptInterface:getKOPTContext(doc, pageno, bbox, screen_size)
+function KoptInterface:getKOPTContext(doc, pageno, bbox)
 	local kc = KOPTContext.new()
+	local screen_size = Screen:getSize()
 	kc:setTrim(doc.configurable.trim_page)
 	kc:setWrap(doc.configurable.text_wrap)
 	kc:setIndent(doc.configurable.detect_indent)
@@ -208,17 +209,34 @@ function KoptInterface:getKOPTContext(doc, pageno, bbox, screen_size)
 	return kc
 end
 
--- calculates page dimensions
-function KoptInterface:getPageDimensions(doc, pageno, zoom, rotation)
-	-- check cached page size
-	local bbox = doc:getPageBBox(pageno)
-	local bbox_hash = bbox.x0.."|"..bbox.y0.."|"..bbox.x1.."|"..bbox.y1
+function KoptInterface:setTrimPage(doc, pageno)
+	local page_dimens = doc:getNativePageDimensions(pageno)
+	--DEBUG("original page dimens", page_dimens)
+	local orig_bbox = doc:getUsedBBox(pageno)
+	--DEBUG("original bbox", orig_bbox)
+	if orig_bbox.x1 - orig_bbox.x0 < page_dimens.w 
+		or orig_bbox.y1 - orig_bbox.y0 < page_dimens.h then
+		doc.configurable.trim_page = 0
+		--DEBUG("Set manual crop in koptengine")
+	end
+end
+
+function KoptInterface:getContextHash(doc, pageno, bbox)
 	local screen_size = Screen:getSize()
 	local screen_size_hash = screen_size.w.."|"..screen_size.h
-	local hash = "kctx|"..doc.file.."|"..pageno.."|"..doc.configurable:hash("|").."|"..bbox_hash.."|"..screen_size_hash
+	local bbox_hash = bbox.x0.."|"..bbox.y0.."|"..bbox.x1.."|"..bbox.y1
+	return doc.file.."|"..pageno.."|"..doc.configurable:hash("|").."|"..bbox_hash.."|"..screen_size_hash
+end
+
+-- calculates page dimensions
+function KoptInterface:getPageDimensions(doc, pageno, zoom, rotation)
+	self:setTrimPage(doc, pageno)
+	local bbox = doc:getPageBBox(pageno)
+	local context_hash = self:getContextHash(doc, pageno, bbox)
+	local hash = "kctx|"..context_hash
 	local cached = Cache:check(hash)
 	if not cached then
-		local kc = self:getKOPTContext(doc, pageno, bbox, screen_size)
+		local kc = self:getKOPTContext(doc, pageno, bbox)
 		local page = doc._document:openPage(pageno)
 		-- reflow page
 		page:reflow(kc, 0)
@@ -237,12 +255,11 @@ function KoptInterface:getPageDimensions(doc, pageno, zoom, rotation)
 end
 
 function KoptInterface:renderPage(doc, pageno, rect, zoom, rotation, render_mode)
+	self:setTrimPage(doc, pageno)
 	doc.render_mode = render_mode
 	local bbox = doc:getPageBBox(pageno)
-	local bbox_hash = bbox.x0.."|"..bbox.y0.."|"..bbox.x1.."|"..bbox.y1
-	local screen_size = Screen:getSize()
-	local screen_size_hash = screen_size.w.."|"..screen_size.h
-	local hash = "renderpg|"..doc.file.."|"..pageno.."|"..doc.configurable:hash("|").."|"..bbox_hash.."|"..screen_size_hash
+	local context_hash = self:getContextHash(doc, pageno, bbox)
+	local hash = "renderpg|"..context_hash
 	local page_size = self:getPageDimensions(doc, pageno, zoom, rotation)
 	-- this will be the size we actually render
 	local size = page_size
@@ -273,7 +290,7 @@ function KoptInterface:renderPage(doc, pageno, rect, zoom, rotation, render_mode
 	}
 
 	-- draw to blitbuffer
-	local kc_hash = "kctx|"..doc.file.."|"..pageno.."|"..doc.configurable:hash("|").."|"..bbox_hash.."|"..screen_size_hash
+	local kc_hash = "kctx|"..context_hash
 	local page = doc._document:openPage(pageno)
 	local cached = Cache:check(kc_hash)
 	if cached then
diff --git a/frontend/ui/config.lua b/frontend/ui/config.lua
index eecd821a3..473d44b62 100644
--- a/frontend/ui/config.lua
+++ b/frontend/ui/config.lua
@@ -180,7 +180,7 @@ function ConfigOption:init()
 	local default_option_height = 50
 	local default_option_padding = 15
 	local vertical_group = VerticalGroup:new{}
-	table.insert(vertical_group, VerticalSpan:new{ width = default_option_padding })
+	table.insert(vertical_group, VerticalSpan:new{ width = default_option_padding * Screen:getDPI()/167 })
 	for c = 1, #self.options do
 		if self.options[c].show ~= false then
 			local name_align = self.options[c].name_align_right and self.options[c].name_align_right or 0.33
@@ -189,9 +189,10 @@ function ConfigOption:init()
 			local name_font_size = self.options[c].name_font_size and self.options[c].name_font_size or default_name_font_size
 			local item_font_face = self.options[c].item_font_face and self.options[c].item_font_face or "cfont"
 			local item_font_size = self.options[c].item_font_size and self.options[c].item_font_size or default_item_font_size
-			local option_height = self.options[c].height and self.options[c].height or default_option_height
-			local items_spacing = HorizontalSpan:new{ width = self.options[c].spacing and self.options[c].spacing or default_items_spacing}
-			
+			local option_height = (self.options[c].height and self.options[c].height or default_option_height) * Screen:getDPI()/167
+			local items_spacing = HorizontalSpan:new{ 
+				width = (self.options[c].spacing and self.options[c].spacing or default_items_spacing) * Screen:getDPI()/167
+			}
 			local horizontal_group = HorizontalGroup:new{}
 			if self.options[c].name_text then
 				local option_name_container = RightContainer:new{
diff --git a/frontend/ui/reader/readercropping.lua b/frontend/ui/reader/readercropping.lua
index 2ec9e598e..58b7f8936 100644
--- a/frontend/ui/reader/readercropping.lua
+++ b/frontend/ui/reader/readercropping.lua
@@ -55,7 +55,9 @@ function ReaderCropping:onPageCrop(mode)
 	self.ui:handleEvent(Event:new("CloseConfig"))
 	-- backup original view dimen
 	self.orig_view_dimen = Geom:new{w = self.view.dimen.w, h = self.view.dimen.h}
-	DEBUG("backup view dimen", self.orig_view_dimen)
+	-- backup original view bgcolor
+	self.orig_view_bgcolor = self.view.outer_page_color
+	self.view.outer_page_color = 7 -- gray bgcolor
 	-- backup original zoom mode as cropping use "page" zoom mode
 	self.orig_zoom_mode = self.view.zoom_mode
 	-- backup original reflow mode as cropping use non-reflow mode
@@ -105,7 +107,11 @@ function ReaderCropping:onCancelPageCrop()
 end
 
 function ReaderCropping:exitPageCrop(confirmed)
+	-- restore view bgcolor
+	self.view.outer_page_color = self.orig_view_bgcolor
+	-- restore view dimens
 	self.ui:handleEvent(Event:new("RestoreDimensions", self.orig_view_dimen))
+	-- restore reflow mode
 	self.document.configurable.text_wrap = self.orig_reflow_mode
 	self.view:recalculate()
 	-- Exiting should have the same look and feel with entering.