PDF route body parameters

To render a PDF, set pdf under the page property:

`pdf` properties for PDF routes

These properties follow Puppeteer's PDFOptions type.

Property name	Type	Description
`scale`	number	Scales the rendering of the page. The value must be between `0.1` and `2`. `optional`
`displayHeaderFooter`	boolean	Whether to show the header and footer. `optional`
`headerTemplate`	string	HTML template for the print header. See the valid HTML pattern below. `optional`
`footerTemplate`	string	HTML template for the print footer. Has the same constraints and support for special classes as PDFOptions.headerTemplate. `optional`
`printBackground`	boolean	Set to `true` to print background graphics. `optional`
`landscape`	boolean	Whether to print in landscape orientation. `optional`
`pageRanges`	string	Paper ranges to print, e.g. `1-5`, `8`, `11-13`. `optional`
`format`	`PaperFormat`	All the valid paper format types when printing a PDF. See all formats. `optional`
`width`	string, number	Sets the width of paper. You can pass in a number or a string with a unit. `optional`
`height`	string, number	Sets the height of paper. You can pass in a number or a string with a unit. `optional`
`margin`	`Margin`	Sets the margin of every page. See the expected properties here `optional`
`preferCSSPageSize`	boolean	Gives any CSS `@page` size declared in the page priority over the `width`, `height`, or `format` option. `optional`
`omitBackground`	boolean	Hides the default white background and allows generating PDFs with transparency. `optional`

Valid HTML pattern for headerTemplate and footerTemplate

It must be valid HTML (base64-encoded) and can include the following classes, which will be replaced with runtime values:

Format name	Size in inches	Size in cm	Size in feet
`Letter`	8.5in x 11in	21.6cm x 27.9cm	0.666ft x 0.917ft
`Legal`	8.5in x 14in	21.6cm x 35.6cm	0.666ft x 1.167ft
`Tabloid`	11in x 17in	27.9cm x 43.2cm	0.917ft x 1.417ft
`Ledger`	17in x 11in	43.2cm x 27.9cm	1.417ft x 0.917ft
`A0`	33.1in x 46.8in	84cm x 118.9cm	2.757ft x 3.898ft
`A1`	23.4in x 33.1in	59.4cm x 84cm	1.948ft x 2.757ft
`A2`	16.54in x 23.4in	42cm x 59.4cm	1.377ft x 1.948ft
`A3`	11.7in x 16.54in	29.7cm x 42cm	0.974ft x 1.377ft
`A4`	8.27in x 11.7in	21cm x 29.7cm	0.689ft x 0.974ft
`A5`	5.83in x 8.27in	14.8cm x 21cm	0.485ft x 0.689ft
`A6`	4.13in x 5.83in	10.5cm x 14.8cm	0.344ft x 0.485ft