diff --git a/graphics/center_of_mass.jl b/graphics/center_of_mass.jl
index 2a95643..5d238a7 100644
--- a/graphics/center_of_mass.jl
+++ b/graphics/center_of_mass.jl
@@ -6,13 +6,13 @@ function gen_COM_graphics()
     box_length = 100
     box_height = 100
 
-    L = 0.35 * box_length
+    L = 0.39 * box_length
 
-    R = 0.35 * box_length
+    R = 0.37 * box_length
 
     A = -0.9 * L
     B = 0.65 * L
-    particel_radius = 0.04 * L
+    particle_radius = 0.05 * L
 
     Ap_vec = Vector(ReCo.Shape.project_to_unit_circle(A, L))
     Bp_vec = Vector(ReCo.Shape.project_to_unit_circle(B, L))
@@ -38,9 +38,10 @@ function gen_COM_graphics()
 
     Drawing(box_length, box_height, "$graphics_export_dir/linear.pdf")
     origin()
+    fontsize(5)
 
     setcolor("black")
-    arrow(Point(-1.1 * L, 0), Point(1.2 * L, 0); arrowheadlength=0.1 * L, linewidth=0.8)
+    arrow(Point(-1.1 * L, 0), Point(1.2 * L, 0); arrowheadlength=0.1 * L, linewidth=1.0)
 
     green_orange = blend(Point(-1.5 * L, 0), Point(1.5 * L, 0))
     addstop(green_orange, 0.0, "orange")
@@ -62,21 +63,20 @@ function gen_COM_graphics()
 
     setcolor("blue")
     for p in (A, B)
-        circle(Point(p, 0), particel_radius, :fill)
+        circle(Point(p, 0), particle_radius, :fill)
     end
+    text("A", Point(A - 0.030 * L, -0.08 * L))
+    text("B", Point(B - 0.030 * L, -0.08 * L))
 
     setcolor("brown")
-    circle(Point(COM, 0), particel_radius, :fill)
+    circle(Point(COM, 0), particle_radius, :fill)
+    text("COM", Point(COM - 0.098 * L, -0.08 * L))
 
     setcolor("black")
-    fontsize(5)
     text("x", Point(1.2 * L, 0.038 * L))
-    text("-L", Point(-L - 0.07 * L, 0.18 * L))
-    text("0", Point(0 - 0.035 * L, 0.18 * L))
-    text("+L", Point(L - 0.07 * L, 0.18 * L))
-    text("A", Point(A - 0.038 * L, -0.06 * L))
-    text("B", Point(B - 0.038 * L, -0.06 * L))
-    text("COM", Point(COM - 0.108 * L, -0.06 * L))
+    text("-L/2", Point(-L - 0.15 * L, 0.20 * L))
+    text("0", Point(0 - 0.030 * L, 0.18 * L))
+    text("+L/2", Point(L - 0.15 * L, 0.20 * L))
 
     finish()
 
@@ -84,18 +84,18 @@ function gen_COM_graphics()
 
     Drawing(box_length, box_height, "$graphics_export_dir/circular_projectiong.pdf")
     origin()
+    fontsize(5)
 
-    arrow(Point(-1.2 * R, 0), Point(1.2 * R, 0); arrowheadlength=0.1 * R, linewidth=0.8)
-    arrow(Point(0, 1.2 * R), Point(0, -1.2 * R); arrowheadlength=0.1 * R, linewidth=0.8)
+    arrow(Point(-1.2 * R, 0), Point(1.2 * R, 0); arrowheadlength=0.1 * R, linewidth=1.0)
+    arrow(Point(0, 1.2 * R), Point(0, -1.2 * R); arrowheadlength=0.1 * R, linewidth=1.0)
 
     setcolor("black")
-    fontsize(5)
     text("α", Point(1.22 * R, 0.035 * R))
     text("β", Point(-0.04 * R, -1.23 * R))
 
     orange_green = blend(Point(0, -R), Point(0, R), "green", "orange")
     setblend(orange_green)
-    setline(0.8)
+    setline(1.0)
     circle(Point(0, 0), R, :stroke)
 
     setcolor("red")
@@ -106,8 +106,10 @@ function gen_COM_graphics()
 
     setcolor("blue")
     for pp in (Ap, Bp)
-        circle(R * pp, particel_radius, :fill)
+        circle(R * pp, particle_radius, :fill)
     end
+    text("A", 1.07 * R * Ap)
+    text("B", 1.14 * R * Bp)
 
     setcolor("black")
     setdash("dot")
@@ -115,10 +117,12 @@ function gen_COM_graphics()
     line(Point(0, 0), COMp, :stroke)
 
     setcolor("purple1")
-    circle(M, particel_radius, :fill)
+    circle(M, particle_radius, :fill)
+    text("COM'", 0.019 * R * M + R * Point(0.0, -0.04))
 
     setcolor("brown")
-    circle(COMp, particel_radius, :fill)
+    circle(COMp, particle_radius, :fill)
+    text("S", 0.029 * R * COMp)
 
     finish()
 
diff --git a/src/RL/RL.jl b/src/RL/RL.jl
index 5bac43d..c28514f 100644
--- a/src/RL/RL.jl
+++ b/src/RL/RL.jl
@@ -61,7 +61,7 @@ function run_rl(;
     seed::Int64=42,
     ϵ_stable::Float64=0.0001,
     skin_to_interaction_r_ratio::Float64=ReCo.DEFAULT_SKIN_TO_INTERACTION_R_RATIO,
-    packing_ratio::Float64=0.22,
+    packing_ratio::Float64=0.15,
     show_progress::Bool=true,
 ) where {E<:Env}
     @assert 0.0 <= elliptical_a_b_ratio <= 1.0
diff --git a/src/Shape.jl b/src/Shape.jl
index a59e3f6..6068e0e 100644
--- a/src/Shape.jl
+++ b/src/Shape.jl
@@ -9,8 +9,8 @@ using LinearAlgebra: LinearAlgebra as LA
 using ..ReCo: ReCo, Particle
 
 function project_to_unit_circle(x::Real, half_box_len::Real)
-    φ = (x + half_box_len) * π / half_box_len
-    si, co = sincos(φ)
+    θ = (x + half_box_len) * π / half_box_len
+    si, co = sincos(θ)
 
     return SVector(co, si)
 end