Use the Caption property to specify the printed document's caption. Use the CaptionAlignment property to align the caption in the header or footer of the printed page. Use the CaptionPosition property to specify whether the document's caption is displayed on the header or footer of the printed page. Use the ShowPageNumbers property to show or hide the page number filed. Use the ExtraCaption property to add extra captions to your document. Use the Font property to assign a different font for the caption printed on the document. Use the <br> to break lines in the caption, and so you can display multiple-lines captions. Use the Images/ReplaceIcon method to add new icons to the control. Use the HTMLPicture property to add custom sized pictures.

Starting from the version 15.0, the Caption property and Caption parameter of  ExtraCaption method supports expressions, that can defines the HTML caption of each page based on different fields such as index of the page, total number of pages, the index of the object being printed / previewed, the index of the page relative to the object being printed, and the number of relative pages. If the Caption's expression is not valid, the Caption itself is displayed as HTML, be replacing the <%page%> and <%count%> fields with the current page, and number of pages, as explained on the bottom of the this page.

The Caption property / parameter supports the following keywords:

• object, indicates the index of the object being printed, as a numeric value. The object, opages and opage fields are useful in case you are printing multiple-objects at the same time, using the PrintExts method. For instance, PrintExts = Array(Grid1, Grid2) specifies that two controls should be sent to the printer, and in this case the object will indicate 0 for the Grid1, and 1 for the Grid2. For instance, Caption = "`<b>` + ( object array (`<s>first-grid`,`<i>second-grid`) )" defines an expression-caption that displays the caption "first-grid" in bold and strikeout, for the first object of the PrintExts, and displays the "second-grid" in bold and italic, for the second object of the PrintExts method. 
• opages defines the number of pages the current object is being previewed / printed, as a numeric value.
• opage indicates the relative-index of the page being printed / previewed, as a numeric value.
• pages defines the total number of pages being previewed / printed, as a numeric value.
• page which specifies the index of the current page, from the total number of pages, as a numeric value. For instance, ExtraCaption("logo","page mod 2 ? `` : `<img>logo</img>`") adds a logo picture on every second-page.

This property/method supports predefined constants and operators/functions as described here.

For instance, Caption can be ( as a valid-expression ): 

• "`My Document Title`", the "My Document Title" is what you get on every page. Please pay attention that we used the ` character to quote the string.
• "`My Document <b>Title</b>`", the "My Document Title" is what you get on every page. Please pay attention that we used the ` character to quote the string.
• "`Page: ` + page + ` from ` + pages", displays Page: 1 from 100, Page: 2 from 100, on each page.
• "page mod 2 ? `odd` : `even`", displays odd on odd pages, and even on even pages.
• "page mod 2 ? `` : `<img>logo</img>`", displays the logo picture on every second page ( even pages ). The HTMLPicture property adds or replaces a picture in HTML captions.
• "page = pages ? `last` : ( ( page - 1 ) array(`first`,`second`,`third`,`forth`,`fifth`,`sixth`,`seventh`,`eighth`,`ninth`,`tenth`) )", displays the last for the last page, first for the page with the index 1, second for the page with the index 2, and so on.

For instance, Caption can be ( as a non-expression ): 

• "My Document Title", the "My Document Title" is what you get on every page
• "My Document <b>Title</b>", the "My Document Title" is what you get on every page
• "Page: <%page%> from <%count%>", displays Page: 1 from 100, Page: 2 from 100, on each page

The following screen shot shows where he caption mat be displayed:

Currently, the Caption property may include the following built-in HTML elements:

• <b> ... </b> displays the text in bold
• <i> ... </i> displays the text in italics
• <u> ... </u> underlines the text
• <s> ... </s> Strike-through text
• <a id;options> ... </a> displays an anchor element that can be clicked. An anchor is a piece of text or some other object (for example an image) which marks the beginning and/or the end of a hypertext link.The <a> element is used to mark that piece of text (or inline image), and to give its hypertextual relationship to other documents. The control fires the AnchorClick(AnchorID, Options) event when the user clicks the anchor element. The FormatAnchor property customizes the visual effect for anchor elements.
• <font face;size> ... </font> displays portions of text with a different font and/or different size. For instance, the <font Tahoma;12>bit</font> draws the bit text using the Tahoma font, on size 12 pt. If the name of the font is missing, and instead size is present, the current font is used with a different size. For instance, <font ;12>bit</font> displays the bit text using the current font, but with a different size.
• <fgcolor rrggbb> ... </fgcolor> or <fgcolor=rrggbb> ... </fgcolor> displays text with a specified foreground color. The rr/gg/bb represents the red/green/blue values of the color in hexa values.
• <bgcolor rrggbb> ... </bgcolor> or <bgcolor=rrggbb> ... </bgcolor> displays text with a specified background color. The rr/gg/bb represents the red/green/blue values of the color in hexa values.
• <solidline rrggbb> ... </solidline> or <solidline=rrggbb> ... </solidline> draws a solid-line on the bottom side of the current text-line, of specified RGB color. The <solidline> ... </solidline> draws a black solid-line on the bottom side of the current text-line. The rr/gg/bb represents the red/green/blue values of the color in hexa values.
• <dotline rrggbb> ... </dotline> or <dotline=rrggbb> ... </dotline> draws a dot-line on the bottom side of the current text-line, of specified RGB color. The <dotline> ... </dotline> draws a black dot-line on the bottom side of the current text-line. The rr/gg/bb represents the red/green/blue values of the color in hexa values.
• <upline> ... </upline> draws the line on the top side of the current text-line (requires <solidline> or <dotline>).
• <r> right aligns the text
• <c> centers the text
• <br> forces a line-break
• <img>number[:width]</img> inserts an icon inside the text. The number indicates the index of the icon being inserted. Use the Images method to assign a list of icons to your chart. The last 7 bits in the high significant byte of the number expression indicates the identifier of the skin being used to paint the object. Use the Add method to add new skins to the control. If you need to remove the skin appearance from a part of the control you need to reset the last 7 bits in the high significant byte of the color being applied to the part. The width is optional and indicates the width of the icon being inserted. Using the width option you can overwrite multiple icons getting a nice effect. By default, if the width field is missing, the width is 18 pixels.
• <img>key[:width]</img> inserts a custom size picture into the text being previously loaded using the HTMLPicture property. The Key parameter indicates the key of the picture being displayed. The Width parameter indicates a custom size, if you require to stretch the picture, else the original size of the picture is used.
• & glyph characters as &amp; ( & ), &lt; ( < ), &gt; ( > ),  &qout; ( " ) and &#number; ( the character with specified code ), For instance, the &#8364; displays the EUR character. The & ampersand is only recognized as markup when it is followed by a known letter or a #character and a digit. For instance if you want to display <b>bold</b> in HTML caption you can use &lt;b&gt;bold&lt;/b&gt;
• <off offset> ... </off> defines the vertical offset to display the text/element. The offset parameter defines the offset to display the element. This tag is inheritable, so the offset is keep while the associated </off> tag is found. You can use the <off offset> HTML tag in combination with the <font face;size> to define a smaller or a larger font to be displayed. For instance: Text with <font ;7><off 6>subscript displays the text such as: Text with _subscript The Text with <font ;7><off -6>superscript displays the text such as: Text with ^subscript
• <gra rrggbb;mode;blend> ... </gra> defines a gradient text. The text color or <fgcolor> defines the starting gradient color, while the rr/gg/bb represents the red/green/blue values of the ending color, 808080 if missing as gray. The mode is a value between 0 and 4, 1 if missing, and blend could be 0 or 1, 0 if missing. The <font> HTML tag can be used to define the height of the font. Any of the rrggbb, mode or blend field may not be specified. The <gra> with no fields, shows a vertical gradient color from the current text color to gray (808080). For instance the <font ;18><gra FFFFFF;1;1>gradient-center</gra></font> generates the following picture:
  
• <out rrggbb;width> ... </out> shows the text with outlined characters, where rr/gg/bb represents the red/green/blue values of the outline color, 808080 if missing as gray, width indicates the size of the outline, 1 if missing. The text color or <fgcolor> defines the color to show the inside text. The <font> HTML tag can be used to define the height of the font. For instance the <font ;31><out 000000><fgcolor=FFFFFF>outlined</fgcolor></out></font> generates the following picture:
  
• <sha rrggbb;width;offset> ... </sha> define a text with a shadow, where rr/gg/bb represents the red/green/blue values of the shadow color, 808080 if missing as gray, width indicates the size of shadow, 4 if missing, and offset indicates the offset from the origin to display the text's shadow, 2 if missing. The text color or <fgcolor> defines the color to show the inside text. The <font> HTML tag can be used to define the height of the font.  For instance the <font ;31><sha>shadow</sha></font> generates the following picture:
  

  or  <font ;31><sha 404040;5;0><fgcolor=FFFFFF>outline anti-aliasing</fgcolor></sha></font> gets:

  

Use the <br> to break the lines, use the <font> element to specify a new face for the font, or to change the size of the font.

Also the Caption property supports the following predefined values:

• <%page%> specifies the current page
• <%count%> indicates the number of pages in the document.