Annotation scale is used to determine text height or the overall scale of an annotation object.

The approach used to calculate an annotation scale depends on whether the object is placed in model space or on a layout.

In Model Space

When 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.

Directly on a Layout

Annotation objects created in paper space on a layout should be created at full size because layouts are commonly plotted at a 1:1 scale. For example, text created with a height of 1/8” in paper space will be output at 1/8” unless a scale other than 1:1 is used to plot the layout.

About Annotation Objects

Annotation objects include dimensions, notes, and other types of explanatory symbols or objects commonly used to add information to your drawing.

Annotation objects provide information about a feature, such as the length of a wall, the diameter of a fastener, or a detail callout. Typically, annotation objects are scaled differently than the views of the drawing, and depend on the scale of how they should appear when plotted.

You can control the method that an annotation object is scaled by defining the object either as non-annotative or annotative.

  • Non-annotative objects, require a fixed size or scale that is calculated based on the scale used to plot the drawing.
  • Annotative objects automatically adjust to display uniformly at the same size or scale regardless of the scale of the view.

The following lists the common annotations you can create in a drawing.

Annotation Drawing Object

Notes and labels

Single-line text

Multiline text

Tabular data


Dimensions and geometric tolerances


Geometric tolerance

Hatches, gradients, and fills


Notes and symbols with leaders



Title blocks and attributes


Attribute definition


Annotations are notes or other types of explanatory symbols or objects that are commonly used to add information to your drawing.

Examples of annotations include

  • Notes and labels
  • Tables
  • Dimensions and tolerances
  • Hatches
  • Callouts
  • Blocks

The types of objects that you use to create annotations include

  • Hatches
  • Text (single-line and multiline)
  • Tables
  • Dimensions
  • Tolerances
  • Leaders and multileaders
  • Blocks
  • Attributes