diff --git a/manimlib/animation/indication.py b/manimlib/animation/indication.py
index 160464b3..bccd697f 100644
--- a/manimlib/animation/indication.py
+++ b/manimlib/animation/indication.py
@@ -12,6 +12,7 @@ from manimlib.animation.fading import FadeOut
 from manimlib.animation.fading import FadeIn
 from manimlib.animation.movement import Homotopy
 from manimlib.animation.transform import Transform
+from manimlib.constants import FRAME_X_RADIUS, FRAME_Y_RADIUS
 from manimlib.constants import ORIGIN, RIGHT, UP
 from manimlib.constants import SMALL_BUFF
 from manimlib.constants import TAU
diff --git a/manimlib/default_config.yml b/manimlib/default_config.yml
index 65001983..5f643071 100644
--- a/manimlib/default_config.yml
+++ b/manimlib/default_config.yml
@@ -18,10 +18,10 @@ directories:
   temporary_storage: ""
 universal_import_line: "from manimlib import *"
 style:
-  tex_template: "default"
-  font: "Consolas"
+  tex_template: "ctex"
+  font: "Source Han Sans Light"
   text_alignment: "LEFT"
-  background_color: "#333333"
+  background_color: "#000000"
 # Set the position of preview window, you can use directions, e.g. UL/DR/OL/OO/...
 # also, you can also specify the position(pixel) of the upper left corner of 
 # the window on the monitor, e.g. "960,540"
@@ -40,5 +40,5 @@ camera_resolutions:
   med: "1280x720"
   high: "1920x1080"
   4k: "3840x2160"
-  default_resolution: "high"
+  default_resolution: "low"
 fps: 30