diff --git a/scam.py b/scam.py
index 0156f18..d51c305 100755
--- a/scam.py
+++ b/scam.py
@@ -1,12 +1,33 @@
 #!/usr/bin/env python3
+
+import argparse
+
+parser = argparse.ArgumentParser()
+parser.add_argument("-a", "--all", dest="show_all_settings", action="store_true", help="show all settings")
+clargs = parser.parse_args()
+
+
+SHOWN_SETTINGS = [
+    "image_background",
+    "image_background_enable", 
+    "image_threshold",
+    "project_axis", 
+    "roi_background",
+    "roi_signal"
+]
+
+
 import wx
 
-#from cam_server_client import PipelineClient
-from fake import PipelineClient
+try:
+    from cam_server_client import PipelineClient
+except ImportError:
+    from fake import PipelineClient
 
 from tools import EXPANDING, STRETCH, make_filled_vbox, make_filled_hbox
 from mathentry import MathEntry
 from listentry import ListEntry
+from entrybutton import EntryButton
 
 
 
@@ -20,7 +41,7 @@ pls = sorted(pls)
 
 class MainFrame(wx.Frame):
 
-    def __init__(self, parent=None, title="test"):
+    def __init__(self, parent=None, title="SCam"):
         super().__init__(parent, title=title)
 
         panel_main = MainPanel(self)
@@ -34,23 +55,59 @@ class MainPanel(wx.Panel):
 
     def __init__(self, parent):
         super().__init__(parent)
+        self.instance = None
+        self.camera = None
 
         self.cb_pls = cb_pls = wx.ComboBox(self, choices=pls)
+
+        self.eb_bkg = eb_bkg = EntryButton(self, label="Background Images", value=100, button="Save Background")
+        eb_bkg.Disable()
+
         self.entries = entries = SettingsList(self)
+
         self.btn_print = btn_print = wx.Button(self, label="Print")
+        btn_print.Disable()
+
+        self.btn_save = btn_save = wx.Button(self, label="Save")
+        btn_save.Disable()
 
         cb_pls.Bind(wx.EVT_COMBOBOX, self.on_select)
+        eb_bkg.button.Bind(wx.EVT_BUTTON, self.on_save_bkg)
         btn_print.Bind(wx.EVT_BUTTON, self.on_print)
+        btn_save.Bind(wx.EVT_BUTTON, self.on_save_cfg)
 
-        widgets = [cb_pls, entries, btn_print]
-        sizer = make_filled_vbox(widgets)
+        widgets = [btn_print, btn_save]
+        btns_sizer = make_filled_hbox(widgets)
+
+        widgets = [cb_pls, STRETCH, eb_bkg, STRETCH, entries, btns_sizer]
+        sizer = make_filled_vbox(widgets, border=10)
         self.SetSizer(sizer)
 
 
+    def on_save_bkg(self, event):
+        num = self.eb_bkg.GetValue()
+        bkgname = pc.collect_background(self.camera, num)
+        self.entries.set("image_background", bkgname)
+        print(bkgname)
+
+
     def on_select(self, event):
-        instance = self.cb_pls.GetValue()
+        self.instance = instance = self.cb_pls.GetValue()
         cfg = pc.get_instance_config(instance)
-        self.entries.update(cfg)
+        print(cfg)
+
+        self.camera = cfg["camera_name"]
+        self.eb_bkg.Enable()
+        self.btn_print.Enable()
+        self.btn_save.Enable()
+
+        if clargs.show_all_settings:
+            filtered_cfg = cfg
+        else:
+            filtered_cfg = {k: v for k, v in cfg.items() if k in SHOWN_SETTINGS}
+
+        self.entries.update(filtered_cfg)
+
         self._adjust_size()
 
 
@@ -61,8 +118,20 @@ class MainPanel(wx.Panel):
 
 
     def on_print(self, event):
-        data = self.entries.get()
-        print(data)
+        new_cfg = self.entries.get()
+        print(new_cfg)
+        old_cfg = pc.get_instance_config(self.instance)
+
+        if not clargs.show_all_settings:
+            old_cfg = {k: v for k, v in old_cfg.items() if k in SHOWN_SETTINGS}
+
+        print("unchanged" if old_cfg == new_cfg else "changed")
+
+
+    def on_save_cfg(self, event):
+        new_cfg = self.entries.get()
+        res = pc.set_instance_config(self.instance, new_cfg)
+        print(res)
 
 
 
@@ -71,7 +140,7 @@ class SettingsList(wx.GridSizer):
     def __init__(self, parent, hgap=5, vgap=5):
         super().__init__(cols=2, hgap=hgap, vgap=vgap)
         self.parent = parent
-        self.children = []
+        self.children = {}
 
     def update(self, cfg):
         self.clear()
@@ -83,15 +152,14 @@ class SettingsList(wx.GridSizer):
 
     def add(self, *args):
         new = Setting(self.parent, *args)
-        self.children.append(new)
+        self.children[new.get_name()] = new
         self.Add(new.state)
         self.Add(new.text, 0, wx.EXPAND|wx.ALL)
 
     def get(self):
         res = {}
-        for i in self.children:
+        for i in self.children.values():
             name = i.get_name()
-            print(name)
             if i.get_state():
                 value = i.get_value()
             else:
@@ -99,6 +167,9 @@ class SettingsList(wx.GridSizer):
             res[name] = value
         return res
 
+    def set(self, name, value):
+        self.children[name].text.SetValue(value)
+
 
 
 class Setting: