diff --git a/src/figures/bode.png b/src/figures/bode.png
index ad4be0e..43126ec 100644
Binary files a/src/figures/bode.png and b/src/figures/bode.png differ
diff --git a/src/figures/gangoffour.png b/src/figures/gangoffour.png
index 4b4da89..3019ce6 100644
Binary files a/src/figures/gangoffour.png and b/src/figures/gangoffour.png differ
diff --git a/src/figures/impulse.png b/src/figures/impulse.png
index 91bd747..c51fa12 100644
Binary files a/src/figures/impulse.png and b/src/figures/impulse.png differ
diff --git a/src/figures/lsim.png b/src/figures/lsim.png
index f2c17ac..74f54b9 100644
Binary files a/src/figures/lsim.png and b/src/figures/lsim.png differ
diff --git a/src/figures/margin.png b/src/figures/margin.png
index d398436..04049bf 100644
Binary files a/src/figures/margin.png and b/src/figures/margin.png differ
diff --git a/src/figures/nichols.png b/src/figures/nichols.png
index a7861c4..5d5dc60 100644
Binary files a/src/figures/nichols.png and b/src/figures/nichols.png differ
diff --git a/src/figures/nyquist.png b/src/figures/nyquist.png
index b4eab1e..35f455b 100644
Binary files a/src/figures/nyquist.png and b/src/figures/nyquist.png differ
diff --git a/src/figures/pzmap.png b/src/figures/pzmap.png
index 9c2fe2b..ff18ac1 100644
Binary files a/src/figures/pzmap.png and b/src/figures/pzmap.png differ
diff --git a/src/figures/rlocus.png b/src/figures/rlocus.png
index 87d478b..1c503d9 100644
Binary files a/src/figures/rlocus.png and b/src/figures/rlocus.png differ
diff --git a/src/figures/sigma.png b/src/figures/sigma.png
index 42974c6..f63eff3 100644
Binary files a/src/figures/sigma.png and b/src/figures/sigma.png differ
diff --git a/src/figures/step.png b/src/figures/step.png
index d776001..4897ce6 100644
Binary files a/src/figures/step.png and b/src/figures/step.png differ