
<section id='NMPlot_ViewingGrids_id'  webfilename='viewinggrids'>
    <title>
        Viewing Grids
    </title>
    <section>
        <title>
            Opening a Grid
        </title>
        <para>
            To open a grid in NMPlot, follow these steps.
        </para>
        <orderedlist>
            <listitem>
                <para>
                    Choose <menutext>Open</menutext> from the <menutext>File</menutext>
                    menu. The standard Windows dialog box for opening files is displayed.
                    Familiarity with the use of this dialog box is assumed.
                </para>
            </listitem>
            <listitem>
                <para>
                    Navigate to the directory where your grid file is located, then
                    open the file. Grid files typically have the extension <filetext>.grd</filetext>.
                </para>
            </listitem>
            <listitem>
                <para>
                    A Grid Document window appears, displaying the contents of the
                    grid.
                </para>
            </listitem>
        </orderedlist>
    </section>
    <section>
        <title>
            The Grid Document Window
        </title>
        <para>
            The Grid Document window displays the contents of a grid. The
            window has two panes. The Summary pane displays a concise summary
            of the grid. The Details pane displays an exhaustive list of the
            grid's contents.
        </para>
        <para>
            Use the tabs at the top of the window, just below the title bar,
            to switch between the two panes. To display the Summary pane,
            click on the tab labeled Summary, or press <keytext>Alt + S</keytext>.
            To display the Details pane, click on the tab labeled Details,
            or press <keytext>Alt + D</keytext>.
        </para>
    </section>
    <section id='NMPlot_GridDocumentWindowSummaryPane_id'>
        <title>
            The Summary Pane
        </title>
        <para>
            The Summary pane of the Grid Document window displays a summary
            of a grid in report form.
        </para>
        <exhibit>
            <img src='NMPlot_ScreenCap_GridView_Summary.png'/>
        </exhibit>
        <para>
            You can scroll through the report, print it, and save it as an
            HTML document. See <iref
            target='WCF_DocumentDisplayControl_id'/> for details.
        </para>
        <para>
            See <iref target='NMPlot_SampleGridSummaryReport_id'/> for a sample
            summary report.
        </para>
    </section>
    <section id='NMPlot_GridDocumentWindowDetailsPane_id'>
        <title>
            The Details Pane
        </title>
        <para>
            The Details pane of the Grid Document window displays a complete
            list of the contents of a grid. It is intended for advanced users
            who need more detail than the Summary pane provides. If you are
            just learning NMPlot, it is recommended that you skip this section,
            and return to it if you later find that the Summary view does
            not provide enough information.
        </para>
        <section>
            <title>
                The Noise Model Grid Format (NMGF) Standard
            </title>
            <para>
                In order to use the Details pane, you will need to understand
                the Noise Model Grid Format (NMGF) standard. NMGF is a documented
                way of representing a grid and its auxiliary information as a
                group of named <termtext>sections</termtext>. An introduction
                to NMGF is available in <iref target='NMGF_Introduction_id'/>.
            </para>
            <para>
                Internally, NMPlot processes all grids using NMGF. If you open
                a grid file that is stored in a format other than NMGF, NMPlot
                will automatically translate the data into the NMGF format as
                it reads the file.
            </para>
            <para>
                The Details pane displays the grid as raw NMGF sections.
            </para>
            <exhibit>
                <img src='NMPlot_ScreenCap_GridView_Details.png'/>
            </exhibit>
        </section>
        <section>
            <title>
                The NMGF Section List
            </title>
            <para>
                The top portion of the Details pane lists all NMGF sections in
                the grid. Each item in the list represents a section. Here is
                an example.
            </para>
            <exhibit>
                <img
                src='NMPlot_ScreenCap_GridView_SectionWithChildren_Closed.png'/>
            </exhibit>
            <para>
                For each NMGF section, five pieces of information are displayed,
                from left to right.
            </para>
            <orderedlist>
                <listitem>
                    <para>
                        A symbol indicating the presence of subsections. A small dot <img
                        src='NMPlot_ScreenCap_GridView_SectionDetails_NoChildDot.png' standard_colors='true'/>
                        indicates that the section does not have subsections. A plus sign
                        <img
                        src='NMPlot_ScreenCap_GridView_SectionDetails_ChildPlus.png' standard_colors='true'/>
                        indicates that the section has subsections.
                    </para>
                </listitem>
                <listitem>
                    <para>
                        An icon for the section type. In the example above, the icon is
                        <img src='NMPlot_ScreenCap_GridView_SectionDetails_Icon.png'/>.
                    </para>
                </listitem>
                <listitem>
                    <para>
                        The four-letter name of the section type. In the example above,
                        the four-letter name is <italic>LINS</italic>.
                    </para>
                </listitem>
                <listitem>
                    <para>
                        A short description of the section type. In the example above,
                        the short description is <italic>Line Geographic Feature</italic>.
                    </para>
                </listitem>
                <listitem>
                    <para>
                        A summary of the data stored in the section and its subsections.
                        In the example above, the summary is <italic>Category = Flight
                        Track, Name = 16A1</italic>.
                    </para>
                </listitem>
            </orderedlist>
            <para>
                Click on the plus sign to the left of the section to view its
                subsections. The subsections will be displayed.
            </para>
            <exhibit>
                <img
                src='NMPlot_ScreenCap_GridView_SectionWithChildren_Open.png'/>
            </exhibit>
            <para>
                One section in the list is always selected. This section is highlighted
                with a different background color. Click on a section to select
                it.
            </para>
        </section>
        <section>
            <title>
                The NMGF Section Browser
            </title>
            <para>
                The bottom portion of the Details pane contains the section browser.
                It displays the contents of the section currently selected in
                the section list.
            </para>
            <para>
                You can copy text from the browser window to the clipboard. To
                do so, first select the desired text by dragging over it with
                the mouse. Then, copy the text by either a) choosing <menutext>Copy</menutext>
                from the <menutext>Edit</menutext> menu, or b) pressing <keytext>Ctrl
                + C</keytext>.
            </para>
        </section>
        <section>
            <title>
                Resizing the Section List and Section Browser
            </title>
            <para>
                To change the relative sizes of the section list and section browser
                windows, use the mouse to drag the separator between the two windows.
            </para>
        </section>
    </section>
</section>
