diff --git a/lib/jkqtplotter/resources/styles/default.ini b/lib/jkqtplotter/resources/styles/default.ini
index 81fda23e78..49997d040c 100644
--- a/lib/jkqtplotter/resources/styles/default.ini
+++ b/lib/jkqtplotter/resources/styles/default.ini
@@ -18,7 +18,7 @@ useraction_marker_brushcolor="red,51"
 useraction_marker_brushstyle=solid
 useraction_marker_diameter=12
 useraction_marker_type=circle+crosshair
-useraction_font_name=MS Shell Dlg 2+XITS
+useraction_font_name=GUI
 useraction_font_size=12
 toolbar_enabled=true
 toolbar_always_visible=false
@@ -40,7 +40,8 @@ actions\mouse_wheel0\action=zoom
 csv_decimal_separator=.
 csv_comment_initializer="# "
 debug_show_region_boxes=false
-debug_region_linewidth=3
+debug_region_linewidth=1
+debug_textbox_linewidth=false
 antialiase_system=true
 antialiase_text=true
 widget_background_color=#f0f0f0
@@ -52,8 +53,8 @@ plot_border_top=5
 plot_border_bottom=5
 text_default_color=black
 text_default_size=8
-text_default_font_name=MS Shell Dlg 2+XITS
-plot_label_font_name=MS Shell Dlg 2+XITS
+text_default_font_name=GUI
+plot_label_font_name=GUI
 plot_label_font_size=12
 plot_frame_visible=false
 plot_frame_color=black
@@ -411,4 +412,4 @@ graphs\graphs_annotation\symbol=symbol_cross
 graphs\graphs_annotation\fill_style=solid
 graphs\graphs_annotation\text_color=black
 graphs\graphs_annotation\font_size=12
-graphs\graphs_annotation\font_name=MS Shell Dlg 2+XITS
+graphs\graphs_annotation\font_name=GUI
diff --git a/lib/jkqtplotter/resources/styles/seaborn.ini b/lib/jkqtplotter/resources/styles/seaborn.ini
index 1bac291f24..9f43907764 100644
--- a/lib/jkqtplotter/resources/styles/seaborn.ini
+++ b/lib/jkqtplotter/resources/styles/seaborn.ini
@@ -18,7 +18,7 @@ useraction_marker_brushcolor="red,51"
 useraction_marker_brushstyle=solid
 useraction_marker_diameter=12
 useraction_marker_type=circle+crosshair
-useraction_font_name=MS Shell Dlg 2+XITS
+useraction_font_name=GUI
 useraction_font_size=12
 toolbar_enabled=true
 toolbar_always_visible=false
@@ -52,8 +52,8 @@ plot_border_top=5
 plot_border_bottom=5
 text_default_color=black
 text_default_size=8
-text_default_font_name=MS Shell Dlg 2+XITS
-plot_label_font_name=MS Shell Dlg 2+XITS
+text_default_font_name=GUI
+plot_label_font_name=GUI
 plot_label_font_size=12
 plot_frame_visible=false
 plot_frame_color=black
@@ -401,4 +401,4 @@ graphs\graphs_annotation\symbol=symbol_cross
 graphs\graphs_annotation\fill_style=solid
 graphs\graphs_annotation\text_color=black
 graphs\graphs_annotation\font_size=12
-graphs\graphs_annotation\font_name=MS Shell Dlg 2+XITS
+graphs\graphs_annotation\font_name=GUI