William Overington

Ah, yes, you answered 10 hours ago, that is about half-past midnight whereas I only saw it this morning.
Oh dear.
William
 

I usually do, but it’s easy to look these things up! Since the OP (original poster) used the abbreviation INDD it was obvious that I wouldn’t need to explain it to the user asking the question, and since that user is an InDesign user it seemed likely that the abbreviation IDML would similarly not require an explanation.

INDD = InDesign Document and IDML = InDesign Markup Language.

As far as I know, Publisher doesn't have a "Save as Slideshow" mode - I've not noticed one - but you can display a PDF like a slideshow using the Full Screen Mode of Adobe Acrobat Reader. Or you can use any number of utilities - search the web, E.g. https://www.ilovepdf.com/pdf_to_powerpoint - that can convert a PDF into a slideshow (I've not used any so can't comment on their usefulness).

Yes, I got it to work, great!
Having seen the advice of @walt.farrell and the response by @Old Bruce I went looking for the Fields panel.
The search was on.
To the Help facility and search for Fields.
So, with information from there, I had to do View Studio and then there was a panel.
So I filled in all six fields and four of them went through to the PDF as displayed in Document Properties in Adobe Reader, so good.
The Document Propertes panel shows four fields and each was filled by information that I had input, and indeed that is more than PagePlus does.
Three of the fields, Title, Author, Subject have the same names in the Document Properties in Adobe Reader as they do in the Fields panel of Affinity Publisher.
The field Keywords in the Document Properties in Adobe Reader has the information that is in Tags in the Fields panel of Affinity Publisher.
However, as far as I can tell at present, information in the Comments field and the Revision field in the Fields panel of Affinity Publisher do not go through to the PDF in a way observable using Adobe Reader, though whether or not they are actually in the document I do not know.
So, the facility of adding author details into a PDF is there.
It seems unfortunate that it is hidden away like that, but then again I have moaned at times at the way when I have started up some programs there are panels all over it and it is hard to know how to get started, for example a Java program environment that I got on a magazine cover disc years ago and when I started it up there seemed to be little panels all over the screen.
However, in fairness, now thinking about it and searching for Author in the Help section of Affinity Publisher does refer to the Fields panel. Also I have not read through the documentation and maybe it is explained there.
So maybe there needs to be, and maybe already is, a guide for an Author-Publisher who wants to publish his or her own writing on the web in PDF form where such things are explained.
William
 
test283.pdf

@Mark Ingram

'Tis here.

There is a Fields panel where you can specify an author name. I don't know if it is placed into an exported PDF, though. 

It has now downloaded.
William
 
 

Oh I have made another mistake! What a thread!
3½″
William
 

5¼″ or 3½″? 

There are many free programs you could use for that, though discussing which one to use is likely to start a kind of religious war, and it's really off-topic for the Affinity forum. But if anything there are more free programming methods available now than in the 90s.

Coding today is very cheap compared to back in the day.
Instead of having to purchase something like Turbo Pascal/C, which you pretty much had to do in the olden days (if you wanted to do it legally), you can now get IDEs and SDKs for free from all kinds of places for just about any language you want. (I remember having to pay £99 for Acorn ANSI C back in the 90's.) Just type "coding for free" (without the quotes) into any search engine and you will get millions of results.
As with Walt, I don't want to get into any kind of "religious war" on this but, since you're using Windows, try searching for "Visual Studio Community" and see what you can get. (Or maybe wait a week or so and download the new version that's - apparently - coming instead of having to upgrade almost immediately.)
Also, depending on what you want to do, there may already be a free library that you can use so you could cut your own coding down quite a bit. (E.g. Searching nuget.org - a good place for libraries and extensions, all open source and free - for "text manipulation" shows 2691 packages.)
Or, if you prefer Pascal/Delphi you could also try lazarus-ide.org
Basically, what I'm trying to say is that the possibilities for free coding are practically endless.

I thought the latest version was 1.7.0.270
 

Free Pascal, as you might reasonably expect, doesn’t cost a fortune. However, since I haven’t tried it myself (or even read a review) I’ve no idea what it’s like to use.

I would like to start a project in Publisher... 40 pages catalogue.. Is Publisher capable to finish it with export to .pdf for press? Did anyone try it?

I have now found the earlier thread.
https://forum.affinity.serif.com/index.php?/topic/75141-a-test-pdf-seems-far-too-large/
William
 

I had an issue of a huge PDF in another thread which I shall try to find.
I found that by having the purpose of the PDF as for the web rather than for print got the size down a lot.
Whether that is significant in this case I do not know but I thought that I wound mention it in case this helps.
William
 

An option to save the positions and sizes of the various open panels and the like so they can be recalled in specific configurations that are tailored to different tasks.
 
I just type the @ character followed by the first letter or two of the user's name and a list pops up to select from.

https://affinity.serif.com/en-gb/store/ very bottom of the page.

Hello,
Are the engineers planning to add EPUB (fixed and reflowable) development functionality to the next version of Publisher? What other options will be available for digital readers?
Thank you,
Sis Moon

That was the first thing which sprang to mind when you mentioned the much smaller size of the version you produced.

Your pdfs fail more stringent accessibility checkers. The main failure is the language tag(s) are not set.