diff --git a/sym-files2/databasebackend.py b/sym-files2/databasebackend.py
index c312bd1..ace6575 100755
--- a/sym-files2/databasebackend.py
+++ b/sym-files2/databasebackend.py
@@ -347,6 +347,16 @@ def _plugin_single(self, name, settings, sys, plugins):
         return outstr
 
     def _as_function_of(self):
+        # If several as_function_of's are defined, func_type will tell which one
+        # - in the legacy case of only one, func type will just be the default
+        # value and not match a key - root key is (which is the only one in
+        # the classic case) is then used
+        func_type = self.o['as_function_of']
+        if func_type in self.ggs['as_function_of']:
+            settings = self.ggs['as_function_of'][func_type]
+        else:
+            settings = self.ggs['as_function_of']
+
         # Get the datetime of the measurement
         for dat in self.data['left'] + self.data['right']:
             query = ('SELECT {0} FROM {1} where id = {2}'
@@ -358,7 +368,7 @@ def _as_function_of(self):
 
             # Fetch all sets of id and label that is from the same time
             query = ('SELECT id, {0} FROM {1} WHERE TIME = \"{2}\"'
-                     ''.format(self.ggs['as_function_of']['column'],
+                     ''.format(settings['column'],
                                self.ggs['measurements_table'],
                                timestamp.strftime("%Y-%m-%d %H:%M:%S")))
             measurements = self._result_from_query(query)
@@ -367,8 +377,7 @@ def _as_function_of(self):
             # e.g.: "temperature"
             new_x_id = None
             for measurement in measurements:
-                search = re.search(self.ggs['as_function_of']['reg_match'],
-                                   measurement[1])
+                search = re.search(settings['reg_match'], measurement[1])
                 try:
                     if len(search.group(0)) > 0:
                         new_x_id = measurement[0]
@@ -379,7 +388,7 @@ def _as_function_of(self):
             if new_x_id:
                 # Change the x-axis label
                 self.data['data_treatment']['xlabel'] =\
-                    self.ggs['as_function_of']['xlabel']
+                    settings['xlabel']
                 # Fetch the pertaining temperature data
                 new_x = self.__get_data_xyplot_single(new_x_id)
                 """ Assumes both dat and new_x contains a common
diff --git a/sym-files2/export_data.py b/sym-files2/export_data.py
index 765d866..72c930c 100755
--- a/sym-files2/export_data.py
+++ b/sym-files2/export_data.py
@@ -59,6 +59,10 @@ def __init__(self):
         for pair in options.boolean_options.split(',')[1:]:
             key, value = pair.split(':')
             self.o[key] = True if value == 'checked' else False
+            if key == 'as_function_of':
+                if value:
+                    self.o['as_function_of'] = value
+
         # Parse bounds
         bkeys = [s + '_bounding' for s in ['xscale', 'left_yscale', 'right_yscale']]
         for bound in bkeys:
@@ -168,7 +172,7 @@ def _print_out_header_xy_data(self, data):
             for n, d in enumerate(data['left'] + data['right']):
                 # Only make output if the current warning key is present in the
                 # current datasets graphsettings
-                if d['lgs'].has_key(warning):
+                if warning in d['lgs']:
                     out += ['"' + warning + '"', '"' + d['lgs'][warning] + '"']
                 else:
                     out += ['', '']
diff --git a/sym-files2/plot.py b/sym-files2/plot.py
index 017ede3..9cc450f 100755
--- a/sym-files2/plot.py
+++ b/sym-files2/plot.py
@@ -85,6 +85,10 @@ def __init__(self):
         for pair in options.boolean_options.split(',')[1:]:
             key, value = pair.split(':')
             self.o[key] = True if value == 'checked' else False
+            if key == 'as_function_of':
+                if value:
+                    self.o['as_function_of'] = value
+
         # Parse bounds
         bkeys = [s + '_bounding' for s in ['xscale', 'left_yscale', 'right_yscale']]
         for bound in bkeys:
diff --git a/sym-files2/xyplot.php b/sym-files2/xyplot.php
index f990799..f6c2b1d 100755
--- a/sym-files2/xyplot.php
+++ b/sym-files2/xyplot.php
@@ -53,7 +53,7 @@
 $matplotlib        = isset($_GET["matplotlib"])         ? "checked"                    : "";
 $plot_options      = isset($_GET["plot_options"])       ? "checked"                    : "";
 $flip_x            = isset($_GET["flip_x"])             ? "checked"                    : "";
-$as_function_of    = isset($_GET["as_function_of"])     ? "checked"                    : "";
+$as_function_of    = isset($_GET["as_function_of"])     ? $_GET["as_function_of"]      : "";
 $diff_left_y       = isset($_GET["diff_left_y"])        ? "checked"                    : "";
 $diff_right_y      = isset($_GET["diff_right_y"])       ? "checked"                    : "";
 $linscale_x0       = isset($_GET["linscale_x0"])        ? "checked"                    : "";
@@ -237,17 +237,32 @@ function microtime_float()
               } else {
                 $show_plot_options = "display:none";
               }
-		    ?>
-		    <span id="plot_options" style="<?php echo($show_plot_options);?>">
-		    <hr>
-		  <?php
-          // Check for specific settings defined in graphsettings.xml and print if defined
+	 ?>
+	 <span id="plot_options" style="<?php echo($show_plot_options);?>">
+	 <hr>
+	 <?php
+         // Check for specific settings defined in graphsettings.xml and print if defined
             if(in_array("flip_x",array_keys($settings)) == "1"){
                echo($settings["flip_x"]["gui"] . "<input type=\"checkbox\" name=\"flip_x\" value=\"checked\"" . $flip_x . "><br>");
             }
+
             if(in_array("as_function_of",array_keys($settings)) == "1"){
-               echo($settings["as_function_of"]["gui"] . "<input type=\"checkbox\" name=\"as_function_of\" value=\"checked\"" . $as_function_of . "><br>");
+                $checked = "";
+                if ($as_function_of == 'default'){
+                   $checked = "checked";
+                }
+                echo($settings["as_function_of"]["gui"] . "<input type=\"checkbox\" name=\"as_function_of\" value=\"default\"" . $checked . "><br>");
             }
+            foreach ($settings["as_function_of"] as $key => $value){
+		if (is_array($value)){
+                    $checked = "";
+                    if ($as_function_of == $key){
+                        $checked = "checked";
+                    }
+                    echo($value["gui"] . "<input type=\"checkbox\" name=\"as_function_of\" value=\"" . $key . "\"" . $checked . "><br>");
+		}
+            }
+
             if(in_array("diff_left_y",array_keys($settings)) == "1"){
                echo($settings["diff_left_y"]["gui"] . "<input type=\"checkbox\" title=\"Assumes equidistant x-spacing!\" name=\"diff_left_y\" value=\"checked\"" . $diff_left_y . "><br>");
             }