pdf.landscapeBoolean(default: false)
Set to true to reverse the paper dimensions if needed such that width is the larger edge.
Example - enable landscape mode
<div id="grid"></div>
<script>
$("#grid").kendoGrid({
    toolbar: ["pdf"],
    pdf: {
        landscape: true
    },
    dataSource: {
        transport: {
            read: {
                url: "https://demos.telerik.com/service/v2/core/products"
            }
        },
        pageSize: 10
    },
    pageable: true
});
</script>
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