Doc: Describe QDS installation options

Fixes: QDS-4441
Change-Id: Ibb602ecc646117ffc4e09af2409f1f5996d01491
Reviewed-by: Jarko Vihriala <jarko.vihriala@qt.io>
Reviewed-by: Johanna Vanhatapio <johanna.vanhatapio@qt.io>
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

doc/qtcreator/src/user-interface/creator-ui.qdoc

@@ -32,7 +32,7 @@
 /*!
     \page creator-quick-tour.html
     \if defined(qtdesignstudio)
-    \previouspage exporting-from-qt3ds.html
+    \previouspage studio-installation.html
     \else
     \previouspage creator-overview.html
     \endif

doc/qtdesignstudio/src/qtdesignstudio-getting-started.qdoc

@@ -26,7 +26,7 @@
 /*!
     \previouspage index.html
     \page studio-getting-started.html
-    \nextpage studio-exporting-and-importing.html
+    \nextpage studio-installation.html
 
     \title Getting Started
 
@@ -34,6 +34,10 @@
     with \QDS:
 
     \list
+        \li \l {Installation}
+
+            \QDS is available either as a standalone installation package or
+            as an option in the Qt online installer.
         \li \l {Exporting and Importing}
 
             Describes how to export designs containing 2D and 3D assets into

doc/qtdesignstudio/src/qtdesignstudio-installation.qdoc

@@ -0,0 +1,69 @@
+/****************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the documentation of the Qt Design Studio.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Free Documentation License Usage
+** Alternatively, this file may be used under the terms of the GNU Free
+** Documentation License version 1.3 as published by the Free Software
+** Foundation and appearing in the file included in the packaging of
+** this file. Please review the following information to ensure
+** the GNU Free Documentation License version 1.3 requirements
+** will be met: https://www.gnu.org/licenses/fdl-1.3.html.
+**
+****************************************************************************/
+
+/*!
+    \page studio-installation.html
+    \previouspage studio-getting-started.html
+    \nextpage creator-quick-tour.html
+
+    \title Installation
+
+    You can install \QDS either using a stand-alone installation package or the
+    Qt online installer. The installers copy all the modules and tools you need
+    to design UIs and preview them on the desktop to your computer and configure
+    them for you.
+
+    To begin, create a \l{Qt Account}. This account gives you access to a web
+    portal to manage your licenses and download the standalone \QDS package or
+    the Qt online installer. Alternatively, you can download an evaluation
+    package \l{https://www.qt.io/product/ui-design-tools}{here}.
+
+    After the installation, you can start exploring \QDS by opening
+    \l{Examples and Tutorials}{examples}, following \l{Tutorials}{tutorials},
+    watching videos, and reading this manual.
+
+    \section1 Stand-Alone Installation
+
+    You can download the \QDS installer for your operating system (\macos,
+    Linux, or Windows) from your Qt Account. Start the installation as you
+    would for any other software, and follow the instructions of the
+    installer to complete it.
+
+    \section1 Using Qt Online Installer
+
+    You can download the Qt online installer for your operating system
+    from your Qt Account.
+
+    \list 1
+        \li Start the Qt online installer.
+        \li Select \uicontrol {Design Tools}.
+            \image studio-installation.png "Design Tools selected in Qt online installer"
+        \li Select \uicontrol Next and follow the instructions of the
+            installer to complete the installation.
+    \endlist
+
+    For more information about the installation process, see
+    \l{Getting Started with Qt}.
+*/

doc/qtdesignstudio/src/qtdesignstudio-toc.qdoc

@@ -28,9 +28,9 @@
 
     \title All Topics
     \list
-        \li \l{Getting Started} (REWRITE)
+        \li \l{Getting Started}
             \list
-                \li \l Installation (NEW)
+                \li \l{Installation}
                 \li \l{User Interface}{Interface Overview}
                     \list
                         \li \l{Selecting Modes}

doc/qtdesignstudio/src/qtdesignstudio.qdoc

@@ -45,9 +45,9 @@
             \li \inlineimage studio-3d-scenes.png
             \li \inlineimage studio-animation.png
         \row
-        \li \b {\l{Getting Started}} (REWRITE)
+        \li \b {\l{Getting Started}}
             \list
-                \li \l Installation
+                \li \l{Installation}
                 \li \l{User Interface}{Interface Overview}
                 \li \l{Creating Projects}{Projects}
                 \li \l{Use Cases} (NEW)