diff --git a/gramps/gen/config.py b/gramps/gen/config.py
index d4a31333a..22475632b 100644
--- a/gramps/gen/config.py
+++ b/gramps/gen/config.py
@@ -226,24 +226,6 @@ register('interface.media-ref-height', 450)
 register('interface.media-ref-width', 600)
 register('interface.media-sel-height', 450)
 register('interface.media-sel-width', 600)
-register('interface.merge-citation-height', 250)
-register('interface.merge-citation-width', 500)
-register('interface.merge-event-height', 250)
-register('interface.merge-event-width', 500)
-register('interface.merge-family-height', 250)
-register('interface.merge-family-width', 500)
-register('interface.merge-media-height', 250)
-register('interface.merge-media-width', 500)
-register('interface.merge-note-height', 250)
-register('interface.merge-note-width', 600)
-register('interface.merge-person-height', 400)
-register('interface.merge-person-width', 700)
-register('interface.merge-place-height', 250)
-register('interface.merge-place-width', 500)
-register('interface.merge-repository-height', 250)
-register('interface.merge-repository-width', 500)
-register('interface.merge-source-height', 250)
-register('interface.merge-source-width', 500)
 register('interface.name-height', 350)
 register('interface.name-width', 600)
 register('interface.note-sel-height', 450)
diff --git a/gramps/gui/merge/mergecitation.py b/gramps/gui/merge/mergecitation.py
index 9e6e9aa59..c7e940dda 100644
--- a/gramps/gui/merge/mergecitation.py
+++ b/gramps/gui/merge/mergecitation.py
@@ -66,9 +66,7 @@ class MergeCitation(ManagedWindow):
         self.set_window(self._gladeobj.toplevel,
                         self.get_widget('citation_title'),
                         _("Merge Citations"))
-        self.height_key = 'interface.merge-citation-height'
-        self.width_key = 'interface.merge-citation-width'
-        self._set_size()
+        self.setup_configs('interface.merge-citation', 500, 250)
 
         # Detailed Selection widgets
         page1 = self.citation1.get_page()
diff --git a/gramps/gui/merge/mergeevent.py b/gramps/gui/merge/mergeevent.py
index d85c39935..2fb853b4f 100644
--- a/gramps/gui/merge/mergeevent.py
+++ b/gramps/gui/merge/mergeevent.py
@@ -65,9 +65,7 @@ class MergeEvent(ManagedWindow):
         self.set_window(self._gladeobj.toplevel,
                         self.get_widget("event_title"),
                         _("Merge Events"))
-        self.height_key = 'interface.merge-event-height'
-        self.width_key = 'interface.merge-event-width'
-        self._set_size()
+        self.setup_configs('interface.merge-event', 500, 250)
 
         # Detailed selection widgets
         type1 = str(self.ev1.get_type())
diff --git a/gramps/gui/merge/mergefamily.py b/gramps/gui/merge/mergefamily.py
index ceb5954da..209a66021 100644
--- a/gramps/gui/merge/mergefamily.py
+++ b/gramps/gui/merge/mergefamily.py
@@ -66,9 +66,7 @@ class MergeFamily(ManagedWindow):
         self.set_window(self._gladeobj.toplevel,
                         self.get_widget("family_title"),
                         _("Merge Families"))
-        self.height_key = 'interface.merge-family-height'
-        self.width_key = 'interface.merge-family-width'
-        self._set_size()
+        self.setup_configs('interface.merge-family', 500, 250)
 
         # Detailed selection widgets
         father1 = self.fy1.get_father_handle()
diff --git a/gramps/gui/merge/mergemedia.py b/gramps/gui/merge/mergemedia.py
index af606d535..dcb1ff55b 100644
--- a/gramps/gui/merge/mergemedia.py
+++ b/gramps/gui/merge/mergemedia.py
@@ -64,9 +64,7 @@ class MergeMedia(ManagedWindow):
         self.set_window(self._gladeobj.toplevel,
                         self.get_widget('object_title'),
                         _("Merge Media Objects"))
-        self.height_key = 'interface.merge-media-height'
-        self.width_key = 'interface.merge-media-width'
-        self._set_size()
+        self.setup_configs('interface.merge-media', 500, 250)
 
         # Detailed selection Widgets
         desc1 = self.mo1.get_description()
diff --git a/gramps/gui/merge/mergenote.py b/gramps/gui/merge/mergenote.py
index 2eddd8c62..e8056d968 100644
--- a/gramps/gui/merge/mergenote.py
+++ b/gramps/gui/merge/mergenote.py
@@ -64,9 +64,7 @@ class MergeNote(ManagedWindow):
         self.set_window(self._gladeobj.toplevel,
                         self.get_widget("note_title"),
                         _("Merge Notes"))
-        self.height_key = 'interface.merge-note-height'
-        self.width_key = 'interface.merge-note-width'
-        self._set_size()
+        self.setup_configs('interface.merge-note', 600, 250)
 
         # Detailed selection widgets
         text1 = self.no1.get_styledtext()
diff --git a/gramps/gui/merge/mergeperson.py b/gramps/gui/merge/mergeperson.py
index dc9027387..9aa300efb 100644
--- a/gramps/gui/merge/mergeperson.py
+++ b/gramps/gui/merge/mergeperson.py
@@ -87,9 +87,7 @@ class MergePerson(ManagedWindow):
         self.set_window(self._gladeobj.toplevel,
                         self.get_widget("person_title"),
                         _("Merge People"))
-        self.height_key = 'interface.merge-person-height'
-        self.width_key = 'interface.merge-person-width'
-        self._set_size()
+        self.setup_configs('interface.merge-person', 700, 400)
 
         # Detailed selection widgets
         name1 = name_displayer.display_name(self.pr1.get_primary_name())
diff --git a/gramps/gui/merge/mergeplace.py b/gramps/gui/merge/mergeplace.py
index 0630843b1..1e8433833 100644
--- a/gramps/gui/merge/mergeplace.py
+++ b/gramps/gui/merge/mergeplace.py
@@ -75,9 +75,7 @@ class MergePlace(ManagedWindow):
         self.set_window(self._gladeobj.toplevel,
                         self.get_widget('place_title'),
                         _("Merge Places"))
-        self.height_key = 'interface.merge-place-height'
-        self.width_key = 'interface.merge-place-width'
-        self._set_size()
+        self.setup_configs('interface.merge-place', 500, 250)
 
         # Detailed selection widgets
         if not config.get('preferences.place-auto'):
diff --git a/gramps/gui/merge/mergerepository.py b/gramps/gui/merge/mergerepository.py
index 0e7d167f6..be1b282e3 100644
--- a/gramps/gui/merge/mergerepository.py
+++ b/gramps/gui/merge/mergerepository.py
@@ -65,9 +65,7 @@ class MergeRepository(ManagedWindow):
         self.set_window(self._gladeobj.toplevel,
                         self.get_widget('repository_title'),
                         _("Merge Repositories"))
-        self.height_key = 'interface.merge-repository-height'
-        self.width_key = 'interface.merge-repository-width'
-        self._set_size()
+        self.setup_configs('interface.merge-repository', 500, 250)
 
         # Detailed selection widgets
         name1 = self.rp1.get_name()
diff --git a/gramps/gui/merge/mergesource.py b/gramps/gui/merge/mergesource.py
index 86d55dccc..ab1544042 100644
--- a/gramps/gui/merge/mergesource.py
+++ b/gramps/gui/merge/mergesource.py
@@ -65,9 +65,7 @@ class MergeSource(ManagedWindow):
         self.set_window(self._gladeobj.toplevel,
                         self.get_widget('source_title'),
                         _("Merge Sources"))
-        self.height_key = 'interface.merge-source-height'
-        self.width_key = 'interface.merge-source-width'
-        self._set_size()
+        self.setup_configs('interface.merge-source', 500, 250)
 
         # Detailed Selection widgets
         title1 = self.src1.get_title()