diff --git a/lua/navigator.lua b/lua/navigator.lua
index 18e1c8e..7ec9494 100644
--- a/lua/navigator.lua
+++ b/lua/navigator.lua
@@ -3,6 +3,7 @@ _NgConfigValues = {
   debug = false, -- log output not implemented
   width = 0.6, -- valeu of cols TODO allow float e.g. 0.6
   preview_height = 0.35,
+  preview_lines = 40,
   height = 0.35,
   default_mapping = true,
   keymaps = {}, -- e.g keymaps={{key = "GR", func = "references()"}, } this replace gr default mapping
diff --git a/lua/navigator/gui.lua b/lua/navigator/gui.lua
index 5736271..17453b6 100644
--- a/lua/navigator/gui.lua
+++ b/lua/navigator/gui.lua
@@ -122,7 +122,8 @@ function M.new_list_view(opts)
   width = math.min(120, width)
   local wheight = math.floor(1 + api.nvim_get_option("lines")
                                  * (_NgConfigValues.height + _NgConfigValues.preview_height))
-  local pheight = math.floor(api.nvim_get_option("lines") * _NgConfigValues.preview_height)
+  local pheight = math.max(_NgConfigValues.preview_lines, math.floor(
+                               api.nvim_get_option("lines") * _NgConfigValues.preview_height))
   local prompt = opts.prompt or false
   if opts.rawdata then
     data = items
diff --git a/lua/navigator/render.lua b/lua/navigator/render.lua
index ca18d85..c3cdde1 100644
--- a/lua/navigator/render.lua
+++ b/lua/navigator/render.lua
@@ -75,6 +75,7 @@ function M.prepare_for_render(items, opts)
       call_by_presented = true
     end
   end
+  -- log(items[1])
 
   for i = 1, #items do
     local space