In Model SpaceWhen annotation objects are created in model space, the following must be considered:. Drawing or plot scale if plotting from model space. Viewport scale of a layout viewport if plotting from a paper space layout.The text height or scale of an annotation object in model space can be set to a fixed text height or be controlled by assigning the object an annotation scale.
Annotation objects assigned a fixed text height or object scale remain proportionate in size to the current plot or viewport scale.If the annotative property of an annotation object is enabled, the text height or scale of the annotation object adjusts based on the current drawing annotation or layout viewport scale with the result that it will remain at the same size automatically.