This is an example of how to have templates on sidecar modules, printable on either portrait or landscape based on user's choice. It excludes Reports, Quotes and Project as they do have a custom pdf generation

detail.hbs

{{!--

// Enrico Simonetti
// enricosimonetti.com
//
// 2017-06-20 on Sugar 7.9.0.0
// filename: custom/clients/base/fields/pdfaction/detail.hbs
//
// Allow for landscape pdf template printing for all modules aside Quotes, Reports and Projects

--}}
<a class="rowaction" href="javascript:void(0);"
   data-action="link"
    {{#if def.tooltip}}
   rel="tooltip"
   data-container="body"
   data-placement="bottom"
   data-original-title="{{str def.tooltip module}}"
    {{/if}}
   name="{{name}}">
    {{#if def.icon}}<i class="fa {{def.icon}}"></i>{{/if}}{{str label}}</a>
{{#if fetchCalled}}
    {{#if templateCollection.length}}
        <ul class="dropdown-inset">
            {{#each templateCollection.models}}
                {{#if ../isCustomPDFView}}
                    <li>
                        <a href="javascript:void(0);" data-action="{{../../../def.action}}" data-id="{{attributes.id}}" data-landscape="0">{{attributes.name}} - {{str 'LBL_PDF_PORTRAIT'}}</a>
                    </li>
                    <li>
                        <a href="javascript:void(0);" data-action="{{../../../def.action}}" data-id="{{attributes.id}}" data-landscape="1">{{attributes.name}} - {{str 'LBL_PDF_LANDSCAPE'}}</a>
                    </li>
                {{else}}
                    <li>
                        <a href="javascript:void(0);" data-action="{{../../../def.action}}" data-id="{{attributes.id}}">{{attributes.name}}</a>
                    </li>
                {{/if}}
            {{/each}}
        </ul>
    {{/if}}
{{/if}}

en_us.pdf_print.php

<?php

// Enrico Simonetti
// enricosimonetti.com
//
// 2017-06-20 on Sugar 7.9.0.0
// filename: custom/Extension/application/Ext/Language/en_us.pdf_print.php
//
// Allow for landscape pdf template printing for all modules aside Quotes, Reports and Projects

$app_strings['LBL_PDF_LANDSCAPE'] = 'Landscape';
$app_strings['LBL_PDF_PORTRAIT'] = 'Portrait';

list.hbs

{{!--

// Enrico Simonetti
// enricosimonetti.com
//
// 2017-06-20 on Sugar 7.9.0.0
// filename: custom/clients/base/fields/pdfaction/list.hbs
//
// Allow for landscape pdf template printing for all modules aside Quotes, Reports and Projects

--}}
<a class="rowaction" href="javascript:void(0);"
   data-action="link"
    {{#if def.tooltip}}
   rel="tooltip"
   data-container="body"
   data-placement="bottom"
   data-original-title="{{str def.tooltip module}}"
    {{/if}}
   name="{{name}}">
    {{#if def.icon}}<i class="fa {{def.icon}}"></i>{{/if}}{{str label}}</a>
{{#if fetchCalled}}
    {{#if templateCollection.length}}
        <ul class="dropdown-inset">
            {{#each templateCollection.models}}
                {{#if ../isCustomPDFView}}
                    <li>
                        <a href="javascript:void(0);" data-action="{{../../../def.action}}" data-id="{{attributes.id}}" data-landscape="0">{{attributes.name}} - {{str 'LBL_PDF_PORTRAIT'}}</a>
                    </li>
                    <li>
                        <a href="javascript:void(0);" data-action="{{../../../def.action}}" data-id="{{attributes.id}}" data-landscape="1">{{attributes.name}} - {{str 'LBL_PDF_LANDSCAPE'}}</a>
                    </li>
                {{else}}
                    <li>
                        <a href="javascript:void(0);" data-action="{{../../../def.action}}" data-id="{{attributes.id}}">{{attributes.name}}</a>
                    </li>
                {{/if}}
            {{/each}}
        </ul>
    {{/if}}
{{/if}}

pdfaction.js

// Enrico Simonetti
// enricosimonetti.com
//
// 2017-06-20 on Sugar 7.9.0.0
// filename: custom/clients/base/fields/pdfaction/pdfaction.js
//
// Allow for landscape pdf template printing for all modules aside Quotes, Reports and Projects

({
    extendsFrom: 'PdfactionField',

    isCustomPDFView: false,
    disabledModules: ['Reports', 'Quotes', 'Project'],

    initialize: function(options) {
        this._super('initialize', [options]);

        if($.inArray(this.module, this.disabledModules) == -1) {
            this.isCustomPDFView = true;
        }
    },

    _buildDownloadLink: function(templateId, isLandscape) {
        var urlParams = $.param({
            'action': 'sugarpdf',
            'module': this.module,
            'sugarpdf': 'pdfmanager',
            'record': this.model.id,
            'pdf_template_id': templateId,
            'landscape': isLandscape
        });
        return '?' + urlParams;
    },

    _buildEmailLink: function(templateId, isLandscape) {
        return '#' + app.bwc.buildRoute(this.module, null, 'sugarpdf', {
            'sugarpdf': 'pdfmanager',
            'record': this.model.id,
            'pdf_template_id': templateId,
            'to_email': '1',
            'landscape': isLandscape
        });
    },

    emailClicked: function(evt) {
        var templateId = this.$(evt.currentTarget).data('id');
        var isLandscape = this.$(evt.currentTarget).data('landscape');

        app.router.navigate(this._buildEmailLink(templateId, isLandscape), {
            trigger: true
        });
    },

    downloadClicked: function(evt) {
        var templateId = this.$(evt.currentTarget).data('id');
        var isLandscape = this.$(evt.currentTarget).data('landscape');

        app.bwc.login(null, _.bind(function() {
            this._triggerDownload(this._buildDownloadLink(templateId, isLandscape));
        }, this));
    }
})

view.sugarpdf.php

<?php

// Enrico Simonetti
// enricosimonetti.com
//
// 2017-06-20 on Sugar 7.9.0.0
// filename: custom/include/MVC/View/views/view.sugarpdf.php 
//
// Allow for landscape pdf template printing for all modules aside Quotes, Reports and Projects

class CustomViewSugarpdf extends ViewSugarpdf
{
    public function preDisplay()
    {
        parent::preDisplay();
        if(isset($_REQUEST['landscape']) && $_REQUEST['landscape'] == 1) {
            $this->sugarpdfBean->setPageFormat(PDF_PAGE_FORMAT, 'L');
        } else {
            $this->sugarpdfBean->setPageFormat(PDF_PAGE_FORMAT, 'P');
        }
    }
}