The overlay process in Revu lets you compare two or more PDFs by converting each document to a different color and stacking them on top of each other as layers in a new PDF. Each layer is transparent and blends with the layers below it. Where the colors are stacked directly over each other, they blend to create a darker color, making it easier to see which elements have changed and which ones have remained the same from revision to revision.
The Batch Overlay lets you create an overlay comparison for multiple files or a multi-page file in one batch process. The Batch Overlay feature is discussed here. There is also a non-batch version of Overlay.
PDFs do not need to be open in Revu when the batch process is run. If a document is open in Revu, any changes resulting from the batch process will be made to the document, but the document will not be saved or checked in (if relevant); the user will need to save and check in the document manually. If a document is not open in Revu, and it is not checked out/locked by another user, changes will be applied and saved to the document automatically (without opening the document in Revu).
In most cases, Revu's auto-matching function will successfully match current sheets with their revisions, but in the event that a consistent naming convention is in place and the auto-matching function doesn't deliver satisfactory results, users can add their own syntax to the matching algorithm. If that doesn't work, or is not an option, manual correlation is always available.
Go to File > Batch > Overlay Pages. The Batch: Overlay Pages wizard appears.
Page Region: Uses the text found within user-defined regions to automatically match documents. To define the page region:
Click and drag to define a region on the PDF. Generally speaking, the data in this region should be located in the same place on each PDF. When the region has been defined, the AutoMark dialog box appears.
Note: AutoMark is most suitable for documents that are vector-based, are the same size and have the same registration. AutoMark might not work as expected if the pages are different sizes, if some of the pages are not searchable or if the scans are not properly registered.
For each of the Match Pages By options except Manual Correlation, you can define an advanced filter for more control over the auto-matching process. To do so, click Advanced and enter the desired Match Filter. See Advanced Match Options for more information.
Click Match. The appropriate matching process is run (as determined by the Match Pages By selection above) and the next page of the Batch: Overlay Pages wizard appears.
If Manual Correlation was selected as the Match Pages By option on the previous screen and one or more pages are not paired, they are automatically discarded.
Click Options to set additional reporting options. The options available vary depending on what kind of report is being generated:
Create Hyperlinks: When enabled, the report will include hyperlinks to the current, revised, and unmatched pages
Advanced Match Options lets you define a custom Match Filter that is used to precisely match pages during the auto-match process.
* Represents zero or more characters that are not a number # Represents a series of characters that form a number ; Separator for specifying multiple filters ? Represents a series of alphabetic letters \ Escape character to treat above characters as literal
All other characters are literal.
Note: An assumed * wildcard always precedes the string. For instance, A#;C# is implied as *A#;*C#.
Note: A space is considered a literal character. Do not include a space after the semicolon or else the filter will take that space into account as well.
The default overlay settings in Revu are changeable. To access the default settings,