diff --git a/lib/crop/cropwidget.ui b/lib/crop/cropwidget.ui
--- a/lib/crop/cropwidget.ui
+++ b/lib/crop/cropwidget.ui
@@ -117,6 +117,9 @@
             <verstretch>0</verstretch>
            </sizepolicy>
           </property>
+          <property name="alignment">
+           <set>Qt::AlignCenter</set>
+          </property>
          </widget>
         </item>
         <item>
@@ -127,6 +130,9 @@
             <verstretch>0</verstretch>
            </sizepolicy>
           </property>
+          <property name="alignment">
+           <set>Qt::AlignCenter</set>
+          </property>
          </widget>
         </item>
        </layout>
@@ -170,6 +176,9 @@
             <verstretch>0</verstretch>
            </sizepolicy>
           </property>
+          <property name="alignment">
+           <set>Qt::AlignCenter</set>
+          </property>
          </widget>
         </item>
         <item>
@@ -180,6 +189,9 @@
             <verstretch>0</verstretch>
            </sizepolicy>
           </property>
+          <property name="alignment">
+           <set>Qt::AlignCenter</set>
+          </property>
          </widget>
         </item>
        </layout>
diff --git a/lib/redeyereduction/redeyereductionwidget.ui b/lib/redeyereduction/redeyereductionwidget.ui
--- a/lib/redeyereduction/redeyereductionwidget.ui
+++ b/lib/redeyereduction/redeyereductionwidget.ui
@@ -74,6 +74,9 @@
        </item>
        <item>
         <widget class="QSpinBox" name="diameterSpinBox">
+         <property name="alignment">
+          <set>Qt::AlignCenter</set>
+         </property>
          <property name="minimum">
           <number>2</number>
          </property>