- created a new custom layout based on the Grid Layout where I can set the horizontal and vertical spacings between grid items and used it throughout the app

appGUI/preferences/gerber/GerberGenPrefGroupUI.py

@@ -1,6 +1,7 @@
 from PyQt6 import QtWidgets, QtCore, QtGui
 
-from appGUI.GUIElements import FCCheckBox, FCSpinner, RadioSet, FCButton, FCSliderWithSpinner, FCColorEntry, FCLabel
+from appGUI.GUIElements import FCCheckBox, FCSpinner, RadioSet, FCButton, FCSliderWithSpinner, FCColorEntry, FCLabel, \
+    FCGridLayout
 from appGUI.preferences.OptionsGroupUI import OptionsGroupUI
 
 import gettext
@@ -24,7 +25,7 @@ class GerberGenPrefGroupUI(OptionsGroupUI):
         self.plot_options_label = FCLabel("<b>%s:</b>" % _("Plot Options"))
         self.layout.addWidget(self.plot_options_label)
 
-        grid0 = QtWidgets.QGridLayout()
+        grid0 = FCGridLayout(v_spacing=3)
         self.layout.addLayout(grid0)
 
         # Plot CB