Birnou ..
That is a most generous offer ....
If you have some spare time, and only at your convenience; I would be most grateful.
I was not looking for someone to 'fix this - please'.
I have had Adobe CC for sooo many years, I have tried tutorial videos like https://www.lynda.com.
But I end-up finding life demanding and have to leave my Adobe/PC dabbling for extended periods, of course in that time I forget all I figured.
This time when my son asked for help putting a site together I tried to get him on to Wix or something like that. I felt I just didn't have the time now, (I am my aged dads f/t carer). Then when I opened CC - WoW so much had changed, almost so, that anything I remembered how to do, I couldn't find/figure cause it didn't look the same as I remembered it.
I know DW is powerful, and I am ashamed to admit I use it almost like Notepad, not even notpad++.
So this is where my original question came from, was what I looking for/to do something built-in to DW. I thought I'm better of asking now when it would be handy to know. Than to find out in a few months/years time - so I found my way here and asked 
P.S.
BTW .....
If you have read this far I'll add:
I'm glad my son encouraged me to do this for him; even though it's been a bit of a bumpy ride, it has shown me I can fit some 'me' time in and dabble around on the PC.
So I think I will take the advice offered here and try some of the Adobe tutorials and start afresh - again.
hello sorry for the delay... I had some work on my desk when beeing back from the event... so ... here is an alternative approach to yours
BUT... yours of replacing the unused page as you did was really fine....
so
Well, first on the source HTML and after the present menu one need to add a new LI item for completing the menu as
<li id="navNewLink" class="nav-item">
<a href="#" class="nav-link"> New Link </a>
</li>
two elements are important in term of semantic, label and case sensitive...
the ID navNewLink
the menu item (as you like) New Link
so still in the source code, one need to add the SECTION reflecting the future and new page content,
here there is a template nuts to be respected before adding the free and pure content
one can add the newt HTML code, just after the line
<!-- Dropdown Script --> (currently present in the source code).
just remark that a class newlink-page is created for this purpose and so need to be added in the style.css file...
just play with a ctrl-f in that document to find aout where
(check in your template material if there is any scss file... for sure that will help to avoid a massive copy / paste in that purpose)
CAUTION !!!! you have an error on the rules at /** End icon-max && Close **/
there is a space .faq-page .full-width, that shouldn't be present as
.faq-page.full-width,
so the HTML SECTION
<!-- Start New Link -->
<section class="newlink-page" id="newlinkPage">
<div class='row height-all'>
<!-- Icon max -->
<div class="col-lg-12 text-right icon-max">
<div class="table-icon-top"> <span> <svg class="icon toggle-width max-min" height="21" viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg">
<path d="M950.857143 1024h-219.428572a73.142857 73.142857 0 1 1 0-146.285714h146.285715v-146.285715a73.142857 73.142857 0 0 1 146.285714 0v219.428572a73.142857 73.142857 0 0 1-73.142857 73.142857z m0-658.285714a73.142857 73.142857 0 0 1-73.142857-73.142857V146.285714h-146.285715a73.142857 73.142857 0 1 1 0-146.285714h219.428572a73.142857 73.142857 0 0 1 73.142857 73.142857v219.428572a73.142857 73.142857 0 0 1-73.142857 73.142857z m-658.285714 658.285714H73.142857a73.142857 73.142857 0 0 1-73.142857-73.142857v-219.428572a73.142857 73.142857 0 0 1 146.285714 0v146.285715h146.285715a73.142857 73.142857 0 1 1 0 146.285714zM292.571429 146.285714H146.285714v146.285715a73.142857 73.142857 0 0 1-146.285714 0V73.142857a73.142857 73.142857 0 0 1 73.142857-73.142857h219.428572a73.142857 73.142857 0 1 1 0 146.285714z" fill="#fff" />
</svg>
<!-- SVG Close Tab -->
<svg class="icon close-section" height="25" viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg">
<path d="M184.64768 836.34176a20.50048 20.50048 0 0 0 28.9792-0.02048l292.70016-293.04832 292.70016 293.04832a20.48 20.48 0 1 0 28.99968-28.93824L535.61344 514.64192 828.0064 221.92128a20.48 20.48 0 1 0-28.9792-28.93824L506.30656 486.03136 213.6064 192.98304a20.48 20.48 0 1 0-28.9792 28.93824l292.37248 292.72064L184.6272 807.38304a20.48 20.48 0 0 0 0.02048 28.95872z" fill="#fff" />
</svg> </span> </div>
</div>
<!-- Icon max -->
<!-- Start -->
<div class="col-lg-12 container-scroll">
<div class="screen-lg-big">
<div class="container">
<div class="row list">
<h2 class="text-center col-lg-12" data-text="Contact"> New Link<span style="color: #1e7e34;"></span> </h2>
<p class="text-center wow fadeIn col-lg-12 contact-parg" data-wow-delay=".1s"> Sub title of the section. </p>
</div>
<!-- CONTENT GOES HERE -->
</div>
</div>
</div>
</div>
</section>
<!-- End New Link -->
in the same way an ID is created, newlinkPage and this id must be set up in the main.js file in the init native function
(you'll see there all the other pages recored... so add
newlinkPage = $('#newlinkPage')
that done, one need to link the menu ittem ... so still in the main.js add
navNewLink = $('#navNewLink')
and on the allSectionMoved, adding the page section ID
in our case --> newlinkPage so modify the appropriate JS line as
allSectionMoved = $('#contactPage, #servicesPage, #aboutPage, #faqPage, #portfolioPage, #newlinkPage')
and the event too... so as the scripts are multiple... one need one by one to add to all of them (navAbout, navFaq, navServices , navPortfolio, navContact
just adding to all of them the add(newlinkPage) just before the removeAttr('style') will be fine
then create your own for this new page (New Link) at the end of all the others one as
// Show New Link
navNewLink.on('click', function () {
activeNavBar(navNewLink);
contactPage.add(ServicesPage).add(portfolioPage).fadeOut(100);
contactPage.add(ServicesPage).add(AboutPage).add(FaqPage).add(portfolioPage).add(newlinkPage).removeAttr('style');
// Close Nav In Mobile
if (navbarTogglerMob.attr('aria-expanded') !== 'false') {
navbarTogglerMob.trigger('click');
}
// show page
newlinkPage.fadeIn(399);
});
then adding the full screen and the close buttons events.
simply look almost at the end of the main.js, and add .add(newlinkPage) to the closeSectionContent function
that should do the job
as it makes a lot of modification, you will find the HTML JS and CSS file on that link,
http://www.birnou.net/tjt11719822.zip
please, let me know when donwloaded, I will remove the archive from server.
hope that helps...
have a pleasant day
b_irnou