This process adds a blank layer to the active PDF. This layer will be completely empty.

1. Go to View > Tabs > Layers or press ALT+Y to show the Layers tab.
2. If there are no layers in the PDF currently, click Add New Layer on the Layers tab toolbar. Otherwise, determine where in the layers list you would like the new layer to be placed:
   • Before an existing layer: Select the desired layer and go to Add New Layer > Add Before.
   • After an existing layer: Select the desired layer and go to Add New Layer > Add After.
   • As the child of an existing layer: select the desired layer and go to Add New Layer > Add Child.
   • At the end of the Layers list: ensure that no Layer is selected and click Add New Layer.
3. Enter a name for the layer and click OK.

This process creates a new layer for the active PDF out of the content layer of a source PDF or imports the Layers from a source PDF and creates duplicate layers in the active PDF.

1. Go to View > Tabs > Layers or press ALT+Y to show the Layers tab.
2. If there are no layers in the PDF currently, click Add Layer from Page on the Layers tab toolbar. Otherwise, determine where in the layers list you would like the new layer to be placed:
   • Before an existing layer: Select the desired layer and go to Add Layer from Page > Add Before.
   • After an existing layer: Select the desired layer and go to Add Layer from Page > Add After.
   • As the child of an existing layer: select the desired layer and go to Add Layer from Page > Add Child.
   • At the end of the layers list: ensure that no layer is selected and click Add Layer from Page.

   The Layers dialog box appears.

   

   • When layers are added from another PDF, they are automatically assigned a default color, layer name, position, and so on. Click Edit Defaults to review or change these default settings. See Editing Default Layer Settings for more information about the available default settings.
   • If there are no other PDFs currently open in Revu, the Open dialog box appears immediately after the Layers dialog box. Navigate to the desired PDF and double-click it and the Add Layer dialog box opens. Skip ahead to Step 5.
3. To add the PDFs currently open in Revu:
   1.  Click Add Open Files.
      • All PDFs currently open in Revu are added. To remove one, select it and click .
   2. Select a PDF and click Modify. The Add Layer dialog box appears. Skip ahead to Step 5.
4. To add a PDF from the workstation or a networked drive, click Add. The Add Layer dialog box appears.

5. In the Add Layer dialog box:

   

   1. The PDFs currently open in Revu are listed in the Source dropdown menu. Select one to use it. Otherwise, click to the right of the Source menu and navigate to the desired PDF.

   2. Select a page range from the Pages dropdown menu to determine which pages of the source file will be added. Options are:

      • All Pages: Sets the range to all pages.
      • Current: Sets the range to the current page only. The current page number will appear in parentheses, for example, Current (2) if page 2 is the current page.
      • Selected: Sets the range to the current selection. This option only appears if pages were selected prior to invoking the command.
      • Custom: Sets the range to a custom value. When this option is selected the list becomes a text box. To enter a custom range:
        • Use a dash between page numbers to define those two pages and all pages in between.
        • Use a comma to define pages that are separated.

        For example: 1-3, 5, 9 will include pages 1, 2, 3, 5 and 9.

   3. Select one of the Layer options:
      • To create a new layer from the source PDF, select Create New and enter a name for the layer in the field to the right.
      • To add the source PDF to an existing layer, select Use Existing and select the desired layer.
      • To import the layers of the source PDF as duplicate layers, select Use Source Layers.
   4. Click the Color button to choose a color to which this layer is to be converted.
   5. The Background can be changed to a range of colors but is set to transparent as a default. If you choose to change this to a solid color to block out any underlying layers, make sure to change the Blend mode to Normal.
   6. Define the Opacity to set the transparency of the content in the layer. 100% (fully opaque) is the default.
   7. Select a Blend mode to determine how the color of overlapping elements will be treated. For example, the “Darken” option will cause elements that overlap on different layers to be combined into a third, darker color.
   8. To choose a specific region of the source page, click Select Region and define the desired region by clicking the points of the shape or by clicking and dragging a rectangle.
   9. The Position options allow you to fine tune the layers if they are not perfectly scaled or if they are slightly skewed (please note that while you can manually adjust Layers with these settings, it is generally recommended that you use the Align Points function described below when possible):
      • Rotation allows you to rotate the layer between 0 and 360 degrees.
      • Scale allows you to make the layer larger or smaller, where 1.00 is equal to 100% (so, for example, a 75% scale should be entered as .75 while a 125% scale should be entered as 1.25).
      • Offset X & Y allows you to move the layer left/right or up/down.
   10. Click OK.

6. If the drawings are not identical in terms of scale and position on the page (for example, if you are comparing scans or a scaled drawing to an original) you will have to align points. To do so:

   1. Click Align Points. A dialog box opens explaining how to align points. Click OK to dismiss it.

   2. On the first drawing, click three points that will act as anchor points between the drawings. It is recommended to use points near the edges of the drawing.

      Tip: Enable Snap to Content on the Status bar to help you get a precise definition.

   3. On the second drawing, click the three points that are analogous to the ones you clicked on the first. You must select them in the same order you did in the first. The alignment is set when you clicked the third point.
   4. If you want to redo the alignment, click Clear Alignment and start again.
7. Click OK.

You can assign one or more markups to an existing layer or create a new Layer and assign the selected markups to it at the same time.

To assign markups to an existing layer, simply right-click the desired markup or, in the case of multiple markups, multi-select them and right-click one of them, then go to Layer and select the desired Layer.

To create a new layer and assign a markup to it at the same time:

1. Right-click the desired markup, then go to Layer > Create New Layer. The Add Layer dialog box opens.

   

2. Enter a name for the new layer and click OK.

Note: If you flatten a markup that is associated with a layer, it will flatten to that layer.

You can flatten markups to an existing layer or create a new layer and flatten markups to it automatically.

1. Go to Document > Flatten.
2. Check Assign Layer and select a Layer from the associated dropdown list or enter a new Layer name in the field manually.
   • If the PDF has no Layers, Revu will automatically populate this field with the name Markups. You can keep this name or change it, as desired.
3. Click Flatten.