Viewports

1. Open the desired PDF.
2. Go to Window > Panels >  Measurements to show the  Measurements panel.

3. Select Add Viewport in the Viewports section.

   

   A dialog might appear containing instructions for defining a viewport. If so, select OK to dismiss it.

4. Drag a rectangle (to draw the viewport as a square, hold down SHIFT while dragging) around the desired viewport area. The Apply Scale to Viewport dialog appears.

5. In the Apply Scale to Viewport dialog, enter a name for the viewport in the Label field.
6. There are three ways to set the viewport scale. If you know the scale and can be assured that no scaling errors occurred during the PDF creation process, using a preset scale or entering a custom one is quick and easy. If you can't be assured that there are no scaling errors on the drawing, calibrating the scale to the drawing is recommended. Choose the one that works best for you:
   • Use a preset scale: Select Preset and choose the scale from the Scale dropdown. If you have previously saved a custom or calibrated scale to your presets, they will be listed at the top.
   • Enter a custom scale: Select Custom and enter the scale: Enter the drawing length on the left and the real-world length on the right. Select the appropriate units for each. Units do not need to match and can be from different systems.
   • Calibrate the scale to the drawing: Select Custom and select Calibrate. If a dialog appears explaining how to use the calibrate tool, select OK to dismiss it, then locate a measured length on the page. Select the first point on the known length, then select the second point to finish the line.
     • Hold down SHIFT to snap the two points horizontally, vertically, or diagonally (as appropriate).
     • If you are working with a vector-based drawing (as opposed to a scanned PDF), you can enable Snap to Content which makes the cursor snap to the underlying lines and drawing elements, making it much easier to accurately select the two points.
7. Viewports can have separate X and Y scales. To set separate X and Y scales, select Separate Y Scale. The scale you just set will default to the X scale. The Y scale can be set using any of the available methods (preset, custom, or calibrate) and need not be the same as the one used for the X scale.
8. Select the measurement precision from the Precision drop-down. Precision is expressed either as a decimal or a fraction depending on the scale being set (or, in the case of separate X and Y scales, of the X scale).
9. To save this scale to the list of preset scales for use on other drawings, select + Add Preset.
10. Select Apply.

Highlight viewports

When a measurement is placed on a PDF that has viewports, the viewports are automatically highlighted and their associated scales are shown. To highlight a specific viewport, select it from the Viewports list and the viewport area, name, and scale will appear in the drawing.

Modify viewports

To change the name of a viewport, select the current name in the Viewports list and change it as desired. Press ENTER or select away from the viewport to apply the change.

To change the scale to one from the list of preset scales, select it from the scale list that appears when you select the current scale in the Viewports list.

To enter a custom scale, calibrate a new scale to the drawing, or modify other scale options of a viewport, More Options to open the Apply Scale to Viewport dialog. You can also rename the viewport from here. See Creating Viewports above for more information about using this dialog box.

Delet viewports

To remove a specific viewport, select it from the list and select Delete Viewport.

To remove all viewports on either the current page or in the entire document, select the appropriate option from the Clear All menu:

• Clear All from Page: Removes all viewports on the current page.

• Clear All from Document: Removes all viewports in the document.