Creating Temporary Scales in Revu | Revu for Mac 2.x

In previous versions of Revu, “Use Embedded Scale” allowed you to create measurements using a different page scale from the one already embedded in the PDF.

In Revu for Mac 2.1, the “Use Embedded Scale” toggle has been removed and Revu’s default behavior is to always use the embedded page scale. In some instances, however, a temporary scale can be set on a PDF:

  • Using Revu in View Mode.
  • Working on a file in a Studio Session.
  • Working on a file in Studio Projects that has not been checked out.
  • A PDF with read-only permissions, or read-only with basic markup permissions.

In these scenarios, a temporary scale can be applied, which allows for measurements of a different scale to be placed while maintaining the document’s original page scale.

Using a Temporary Scale

A temporary scale is created the same way you would set the true page scale. The difference is that, when setting a temporary scale there is a notice stating, “This document’s page scale is protected.” This means that, once you close the document, the temporary scale will be removed and the document will return to its true page scale.
To set a temporary scale on a protected document:

  1. Open the Measurements panel (Option-U).
  2. In the Page Scale section underneath the message, “This document’s page scale is protected,” create a preset or custom scale. You may also click the Calibrate button to generate a temporary scale based on the distance between two points.

Once a temporary scale has been set, the measurements you place afterwards will adhere to that scale. Only the measurements of the person who created the temporary scale will be affected by the temporary scale. Other users’ measurements will still appear according to the actual page scale.

Removing a Temporary Scale

A temporary scale is removed when a document is closed, but any markups placed while the temporary scale was active will maintain their measurements using that scale. To change the scale of existing measurements back to the true page scale, you can use the Recalibrate button within the Measurement Panel (Option-U). This will update the scale of all your markups to the current page scale. Note that this will recalibrate markups placed before the temporary scale was created, as well.

Exporting a document with a temporary scale

PDFs uploaded to a Studio Session are protected documents, so creating a temporary scale in a Session is possible. Once the PDF is removed from the Session and saved to your device, however, it is no longer a protected document capable of having a temporary scale. In this situation, any measurements placed on the PDF while it was within the Session will continue to display according to the temporary scale they once had. Moving a measurement to a new location on the PDF, however, will cause it to be recalibrated according to the true page scale. You’ll see the measurement’s value immediately update on the PDF as well as in the markups list.

Viewports

Temporary scales can only be set on protected documents that fall into one of the categories listed above. If you’re working on an unprotected document, you can use viewports to set a scale different from the rest of the document.

To create a viewport:

  1. Open the Measurements panel (Option-U).
  2. Click + in the Viewports section.
  3. Click and drag a rectangle around the desired area.
  4. Name the viewport, and choose between a preset or custom scale.

You’ll now see a blue viewport on your PDF. Any measurement created within it’s box will adhere to the scale you just set.

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