You can automate the process of scaling annotations in various layout viewports and in model space.
Objects that are commonly used to annotate drawings have a property called Annotative. This property allows you to automate the process of scaling annotations so that they plot or display at the correct size on the paper.
Annotation scale is a setting that is saved with model space, layout viewports, and model views. When you add annotative objects to your drawing, they support the current annotation scale and are scaled based on that scale setting and automatically displayed at the correct size in model space.
Objects that are commonly used to annotate drawings have a property called Annotative. When the Annotative property for these objects is turned on (set to Yes), these objects are called annotative objects
For model space or a layout viewport, you can display all the annotative objects or only those that support the current annotation scale.
When you create an annotative object in your drawing, it supports one annotation scale: the annotation scale that was current when you created the object. You can update annotative objects to support additional annotation scales.