Adds release notes for PR

releasenotes/notes/dag_drawer_custom_style-ec99bd874858f6a6.yaml

@@ -0,0 +1,33 @@
+---
+features_visualization:
+  - |
+    Introduced custom styles for the dag_drawer() function. This allows you
+    to pass a dictionary to the `style` parameter with custom attributes that
+    changes the style of the DAG the function returns. For example::
+
+      from qiskit import QuantumRegister, ClassicalRegister, QuantumCircuit
+      from qiskit.converters import circuit_to_dag
+      from qiskit.visualization import dag_drawer
+       
+      q = QuantumRegister(3, 'q')
+      c = ClassicalRegister(3, 'c')
+      circ = QuantumCircuit(q, c)
+      circ.h(q[0])
+      circ.cx(q[0], q[1])
+      circ.measure(q[0], c[0])
+      circ.rz(0.5, q[1]).c_if(c, 2)
+
+      dag = circuit_to_dag(circ)
+
+      style = {
+          "inputnodecolor": "pink",
+          "outputnodecolor": "lightblue",
+          "opnodecolor": "red",
+      }
+
+      dag_drawer(dag, style=style)
+fixes:
+  - |
+    Fixes a bug where `style=plain` did not show circuit labels for the nodes
+    of the DAG.
+