Working with Viewports in Layouts is a very powerful method
of seeing your design over several scaled views to give overall and detail drawings. In the image below the Dimensions and Text are visible in both
Viewports. Ideally these objects (Annotations) should be all the same size on the final plotted sheet.
AutoCAD’s Annotation Scale feature means you do not have to create many different Annotations at different scales.
The key to successful Annotating is to create the viewport and lock the viewport scale. This prevents the scale and location being changed by mistake. Next activate the viewport by double clicking inside its boundary. Select the Annotation tool as required, the object created is automatically scaled to match the viewport / annotation scale.
Annotations that are to be visible at more than one viewport scale, that is to say, in multiple viewports each at a different scale, should have the required Annotation Scale added to the Annotations Object Scale List.
Access the Object Scale List by selecting the Annotative Object and Right Mouse Click > Annotative Object Scale > Add/Delete Scales…
The differences between Annotations placed in Model Space and Layout can be seen when comparing the Paper text Height and Model text Height properties of the objects using the properties palette (Ctrl+1).
Comparing the two Text objects, “VIEWPORT SCALE 1:1” and “BEARING HOUSING – FRONT VIEW”. The first object is placed in Layout Space with an Annotative Scale of 1:1. The second object is placed inside the active Viewport (into Model Space) with an Annotative Scale of 2:1
It is important to note that both objects have a Paper text Height the same.
AutoCAD would have automatically calculated the Model text Height of the second object when it was being created based upon the scale of the viewport the text was created in.
Text, Dimensions, Hatch Patterns, Multileaders, Blocks and Attributes are all classed as Annotative objects and are created using Styles. You should select a Style that has been designed to work with the Annotation Scale feature. This will mean objects created in viewports will scale correctly according to that viewport current scale.
The Annotation symbol
can be seen next to Annotative Style names in the Text, Dimension and Multileader Style pick lists.
When you hover your cursor over an Annotative object, the symbol will dispaly.
Selecting an Annotative object in Model Space will display the object at ALL of it’s Annotation Scales, in the image above the Multileader has two Annotation Scales, the object has been moved within it’s respective viewport therefore highlighting as two objects. This object is one object. Any edits made to the content will reflect in ALL viewports that this object is visible in.
Currently, the only viewports the object will be visible in are viewports with scales of 1:1 and 1:2. If the drawing is seen through a viewport at a different scale (say 2:1 for example) the annotative object will be hidden. Adding the scale 2:1 to the Object Scale List will make the object visible in that viewport.
Where Annotation Objects appear to be in different locations in different viewports ‘hot grip’ the object and drag the object to a new location in the active viewport. The object for a different annotation scale will not be dragged.
NOTE – Using the MOVE command will move ALL different scale objects.