Blog: Bluebeam Page Scales and Viewports

The digital world is here to stay, and in the AEC industry the portable document format is becoming an industry standard.  In our last blog we covered the importance of setting scalable markups. Now, let us cover the workflow of adding Page Scales and Viewports to your PDF which will help optimize your newly created scalable markups. This will also allow you to place accurate measurements directly on your PDF. Let us dive in and talk about how we can accomplish these two features.

Page Scales are used to ensure the accuracy of any measurement and takeoffs placed. When you are ready to set the scale to a page, you need to access the calibrate feature. This can be done from the Tools menu option > Measure > Calibrate, or the Measurement toolbar> Calibrate, or Measurement Panel > Page Scale> Calibrate. Once you prompt this feature you will see the Set Scale feature populate.  If you do not set the scale prior to placing a measurement markup you will be prompted to with the Set Scale dialog box. Select either Calibrate or Input.


Calibrates the document to allow accurate measurements to be taken by measuring the length between a known distance on the drawing.

1) A dialog box might appear with instructions regarding the use of the Calibrate If it does, click OK.

2) Add a measurement to a known point (such as a scale bar). Click your first point, the click the second point (Tip: Holding SHIFT allows you to place orthogonal measurement lines).

3) Now enter the known distance that the measurement represents between the two points and set what the units will be reporting.

4) Next you can take this chance to set what your desired precision will be from the Precision Menu.

5) Select what page you would like the scale to be applied too. Keep in mind that each page can have its own scale.

6) Click OK.


If the page scale is known and you are certain no scaling has occurred during the PDF creation process, you can input a page scale manually.

1) Select Preset for commonly used scales or a Custom one for manual input.

2) For Preset, simply select from the list of commonly used scales and for Custom enter your desired scale in the fields.

3)Next you can take this chance to set your desired precision will be from the Precision Menu.

4) Select what page you would like the scale to be applied too. Keep in mind each page can have its own scale.

Click OK.

Creating Viewports

This is an invaluable tool to have when working with multiple scaled areas on a single PDF. It allows you to create a zone on a page that is set to a specific scale that may not match the set page scale

1) Open the PDF you want to add a Viewport to.

2) To place the Viewport go to Window> Panels> Measurement or use the hot key ALT + U which will populate the Measurement Panel3) Click  Add Viewport in the Viewport Section of the Measurement Panel.

3) Click Add Viewport in the Viewport Section of the Measurement Panel.

4) Now Click and Drag a rectangle around the area you wish to create a Viewport, next a dialog box will populate and prompt you to enter a desired name for the Viewport. (Tip: Hold down SHIFT while defining your Viewport to draw a square).

5) Click Calibrate in the Viewports section and select two points within the viewport to define its scale. Viewports that are not calibrated are automatically set at the document’s default scale.

a. Viewports can also hold sperate X and Y scales. To do this, select Sperate Vertical Scale to enable this option. Setting this feature is the same process for the PDF itself.

6) Precision can also be set for the Viewport from the Precision drop down.

Contact an ATG Account Executive at 1.800.935.4894 or email us to learn more about Bluebeam.

Bluebeam and Revu are registered trademarks of Bluebeam, Inc., used under license.


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