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    Hi,<br>
    <br>
    It isn't directly possible.<br>
    <br>
    However, starting with QGIS 2.6 you can use the visibility presets
    (bookmarks of combinations of layer visiblities) which can be used
    directly in both the main window and the print composer. So you can
    switch very quickly in both windows.<br>
    <br>
    Andreas<br>
    <br>
    <br>
    <div class="moz-cite-prefix">On 13.01.2015 23:57, drruddy gmail
      wrote:<br>
    </div>
    <blockquote
      cite="mid:etPan.54b5a2e8.2ae8944a.ba5@Marks-MacBook-Pro.local"
      type="cite">
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        <div id="bloop_customfont" style="margin: 0px;">Hello Matt,</div>
        <div id="bloop_customfont" style="margin: 0px;"><br>
        </div>
        <div id="bloop_customfont" style="margin: 0px;">I don’t think
          that’s possible. Would be interested to know if it can be done
          but I’ve only been able to change layers in composer from map</div>
        <div id="bloop_customfont" style="margin: 0px;"><br>
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        <div id="bloop_customfont" style="margin: 0px;">MR</div>
      </div>
      <br>
      <br>
      <p style="color:#000;">On 13 January 2015 at 22:48:42, Matt Boyd (<a
          moz-do-not-send="true" href="mailto:mattslists@gmail.com">mattslists@gmail.com</a>)
        wrote:</p>
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              <p dir="ltr">Thanks junior,<br>
                This is what I'm doing at the moment. What I'd like is
                to be able
                to load the locked items in the print composer to the
                main
                window.<br>
                Sorry if I wasn't clear.</p>
              <div class="gmail_quote">On 13/01/2015 7:02 pm, "Junior"
                <<a moz-do-not-send="true"
                  href="mailto:delazj@gmail.com">delazj@gmail.com</a>>
                wrote:<br type="attribution">
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                  .8ex;border-left:1px #ccc solid;padding-left:1ex">
                  <div
                    style="font-size:12pt;font-family:Calibri,sans-serif">
                    <div>Hi Matt,</div>
                    <div>Once you have activated all the layers that
                      should be
                      displayed in your print composer, select the map
                      item inside your
                      print composer and check the option "lock layers
                      for map item" in
                      the properties tab.</div>
                    <div>More info can be found below "Composer Items"
                      chapter in this
                      link <a moz-do-not-send="true"
href="http://docs.qgis.org/2.6/en/docs/user_manual/print_composer/print_composer.html"
                        target="_blank">http://docs.qgis.org/2.6/en/docs/user_manual/print_composer/print_composer.html</a></div>
                    <div><br>
                    </div>
                    <div>Envoyé depuis mon HTC</div>
                    <br>
                    <div>----- Reply message -----<br>
                      De : "Matt Boyd" <<a moz-do-not-send="true"
                        href="mailto:mattslists@gmail.com"
                        target="_blank">mattslists@gmail.com</a>><br>
                      Pour : "qgis-user" <<a moz-do-not-send="true"
                        href="mailto:qgis-user@lists.osgeo.org"
                        target="_blank">qgis-user@lists.osgeo.org</a>><br>
                      Objet : [Qgis-user] Edit print composer<br>
                      Date : mar., janv. 13, 2015 06:02</div>
                  </div>
                  <br>
                  <div dir="ltr">Hi QGISers,
                    <div>I've got a few different print composers in the
                      same project
                      and it's slightly painful to go back and turn
                      layers on/off when I
                      want to edit one of them.</div>
                    <div><br>
                    </div>
                    <div>Is there an easy way to turn on/off the layers
                      in a particular
                      print composer automagically?</div>
                    <div><br>
                    </div>
                    <div>THanks</div>
                    <div>Matt</div>
                  </div>
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