+In this dialog:
+- Input or accept the default \b Name of the resulting shape.
+- Click the arrow button and select in the Object Browser or in the Viewer the \b Face, for which the Isoline is built.
+- Select along which coordinate: \b U-Isoline or \b V-Isoline the Isoline is built;
+- Set \b Parameter (ranging from 0 to 1), which defines the proportion, at which a face is divided by the isoline.
+If Parameter=0.5, the isoline is a median.
+- Press "Apply" or "Apply & Close" button to get the result (an edge or a compound of several edges).
+
+This operation can be performed using a <b>TUI Command:</b>
+
+<em>geompy.MakeIsoline(theFace, IsUIsoline, theParameter)</em>
+
+<b>Arguments:</b> Name + Face + Type (True for U-Isoline; False for V-Isoline) + Parameter.
+