Hi @mary, A college from the office recommended the same way and it worked! thank you for the answer! It solved the issue after unchecking the “Layout Scale” and checking the “Model Scale”. By looking to document features I found those two below and fixed the issue from the RhinoCommon side:
RhinoDoc doc = RhinoDoc.ActiveDoc;
doc.ModelSpaceAnnotationScalingEnabled = true;
doc.LayoutSpaceAnnotationScalingEnabled = false;