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Comments, Highlights, and Tracked Changes

The comments and tracked changes can be made visible in the PDF output by setting the show.changes.and.comments transformation parameter to yes.

Figure 1. Chemistry Annotations in Acrobat Reader

By default, they are shown as PDF text annotations (sticky notes). These are graphical markers in the document content and are also listed in the Comments section when opening the output file in Acrobat Reader.

Note: Comments with the Mark as Done flag selected appear with a check mark in the Comments section and with a Completed label (

To avoid rendering the elements as PDF annotations and show them as footnotes instead, you can use the show.changes.and.comments.as.pdf.sticky.notes transformation parameter set to no.

The comments and changes are included in the merged map file either as XML elements (<oxy-insert>, <oxy-delete>, <oxy-comment>, <oxy-attributes>) in the case of the XML merged map, or as HTML elements with similar classes (oxy-insert, oxy-delete, oxy-comment, oxy-attributes) in the case of the HTML merged map. Sub-elements contain meta-information about each change.

Tip: These elements are automatically recognized and transformed in PDF annotations when using Chemistry as PDF processor.

Note: The inserted text, deleted text, and deleted markup are included in the sticky notes, you can change this behavior by using the show.changed.text.in.pdf.sticky.notes.content parameter.

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Comments and Tracked Changes - Built-in CSS

The built-in CSS that controls the way tracked changes and comments are displayed is found in: [PLUGIN_DIR]css/print/p-side-notes.css.

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Comments and Tracked Changes - HTML Fragment

This section contains information about how each type of tracked change is structured in the merged map HTML file.

Insertions

For an insertion type of tracked change, the structure that defines the insertion details is inside a range (oxy-range-start to oxy-range-end), the inserted text is highlighted by a <span> element with the class oxy-insert-hl, and the details are stored in a <span> element with the oxy-insert class.

    <span class="oxy-range-start" id="sc_1" hr_id="1"/>

       <span class="oxy-insert" href="#sc_1" hr_id="1">
           <span class="oxy-author">dan</span>
           <span class="oxy-content">insert</span>
           <span class="oxy-date">2018/03/15</span>
           <span class="oxy-hour">09:38:29</span>
           <span class="oxy-tz">+02:00</span>
       </span>
       <span class="oxy-insert-hl">This is an insert!!</span>

    <span class="oxy-range-end" hr_id="1"/>

Comments

Similar to insertions, comments are defined in a range (oxy-range-start to oxy-range-end), the comment details in an element with the class oxy-comment, and the highlighted content is wrapped in the oxy-comment-hl element.

    <span class="oxy-range-start" id="sc_1" hr_id="1"/>
      
        <span class="oxy-comment" href="#sc_1" hr_id="1">
              <span class="oxy-author">dan</span>
              <span class="oxy-comment-text">This is a comment.</span>
              <span class="oxy-date">2018/03/15</span>
              <span class="oxy-hour">09:56:59</span>
              <span class="oxy-tz">+02:00</span>
        </span>
          
        <span class="oxy-comment-hl">The commented text.</span>
          
    <span class="oxy-range-end" hr_id="1"/>

Note: Comments that are marked as done have a flag="done" attribute:

<span class="oxy-comment" href="#sc_6" hr_id="6" flag="done">

Attribute changes

The attribute changes are more complex. The range is empty, and is directly above the affected element (the one that has modified attributes). The element with the class oxy-attributes contains details about multiple attribute changes, each stored in an element with the class oxy-attribute-change.

<element>

  <span class="oxy-range-start" id="sc_3" hr_id="3"/>
  <span class="oxy-range-end" hr_id="3"/>

  <span class="oxy-attributes" href="#sc_3" hr_id="3">

     <span class="oxy-attribute-change" type="inserted" name="platform">
          <span class="oxy-author">dan</span>
          <span class="oxy-current-value">windows</span>
          <span class="oxy-date">2018/03/15</span>
          <span class="oxy-hour">10:05:04</span>
          <span class="oxy-tz">+02:00</span>
     </span>
    ....
     <span class="oxy-attribute-change" type="removed" name="audience">
        ....    
     </span>
  </span>
...
</element>

Deletions

For a deletion, there are some elements that define the start and end of the deletion, and the highlighted text is wrapped in an element with the class oxy-delete-hl.

   <span class="oxy-range-start" id="sc_2" hr_id="2"/>
   <span class="oxy-delete-hl"> This is a deleted text. </span>
   <span class="oxy-range-end" hr_id="2"/>

There is a structure that offers details about the deletion change, using the element with the class oxy-delete. This is linked to the above deletion range by the same ID value:

   <span class="oxy-delete" href="#sc_2" hr_id="2">
       <span class="oxy-author">dan</span>
       <span class="oxy-content"><image href="../img/ex.gif"></span>
       <span class="oxy-date">2018/03/14</span>
       <span class="oxy-hour">11:38:06</span>
       <span class="oxy-tz">+02:00</span>
   </span>

Colored Highlights

To show some text as highlighted with a background color:

  <span class="oxy-color-hl" color="rgba(140,255,140,50)">Some colored text.</span>

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How to Style Tracked Changes or Comments

Here are some examples showing how to customize tracked changes and highlighted text:

If you want to change the highlighted text color from the document content, use the @class="oxy-comment-hl" attribute (or @class="oxy-delete-hl", @class="oxy-insert-hl"):
```
.oxy-comment-hl {
  color:magenta;
}
```
If you want to change the range labels indicating the start or the end of a change (by default, formatted like this: "[n]...[/n]" where n is the change number), you can use the following selectors:
```
.oxy-range-start:before {
  content:'[START]';
  color:red;
}
.oxy-range-end:before {
  content:'[END]';
  color:red;
}
```
If you want to only show the changes and comments highlights
```
.oxy-range-start,
.oxy-range-end {
  display: none;
}
.oxy-insert,
.oxy-delete {
  display: none;
}
```
Note: No comments will be displayed in the PDF Viewer Comments view after this modification.

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How to Style Tracked Changes Shown as Footnotes

Important: This topic is relevant if you have set the show.changes.and.comments.as.pdf.sticky.notes transformation parameter to no, and therefore the changes are shown as footnotes instead of PDF annotations.

Here are some examples showing how to customize footnotes:

If you want to change the background color and the border of the comment footnote, add the following snippet in your customization CSS:
```
.oxy-comment {
  background-color:inherit;
  border: 2pt solid yellow;
}
```
Similarly, you can style the other footnotes for @class="oxy-attributes", @class="oxy-delete", and @class="oxy-insert".
If you want to hide some footnotes (for example, the footnotes associated with the insertions, deletions, or attribute changes when your document contains a lot of tracked changes), add something like this in your customization CSS (the following example results in the deletions and insertions being hidden, but the comments remain visible):
```
.oxy-attributes,
.oxy-delete,
.oxy-insert{
  float:none;
  display:none;
}
```

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How to Show Only Change Bars on Tracked Changes

It is possible to only display the change bars for tracked changes (inserted or deleted content) in the PDF document while hiding the other styling for the tracked changes. This is helpful if you want to see the document in a final version while still seeing change bars where content was inserted or deleted.

To achieve this, follow these steps:

Set the show.changes.and.comments parameter to yes and the show.changes.and.comments.as.pdf.sticky.notes parameter to no.
Step Result: The first parameter causes tracked changes to be visible in your document and styled (e.g. insertions are blue and underlined, while deletions are red with a strike-through). Changing the second parameter to no causes the tracked changes to be displayed as a footnote instead of a PDF annotation.

Hide the footnotes by adding the following in your customization CSS:

.oxy-attributes,
.oxy-comment,
.oxy-delete,
.oxy-insert {
  float: initial;
  display: none;
}

Remove the change range markers (the { and } symbols):

.oxy-range-start:before,
.oxy-range-end:before {
  content:none;
}

Remove the styling for the insertions and deletions:

.oxy-insert-hl{
  color:unset;
  text-decoration:none;
}
.oxy-delete-hl {
  content: "\200b";
  text-decoration:none;
}
.oxy-comment-hl{
  background-color:unset;
}
.oxy-color-hl[color]{
  background-color:unset;
}

[Optional] You can improve the visibility of the change bars with this construct:

.oxy-range-start[is-changebar]:before(100) {
  -oxy-changebar-color: red;
  -oxy-changebar-width: 3pt;
}