+- **Allow automatic constraint substitution/remove** allows automatic resolving of conflicting constraints.
+ The following conflicts could be processed:
+ - Horizontal/Vertical automatic constraints (this last constraint will be removed);
+ - Pair of arcs connected smoothly, which centers are coincident (Tangency between arcs will be removed);
+- **Notify automatic constraint substitution/remove** defines a message box to be shown to the user, if the conflicting constraints situation is automatically resolved.