If you choose to not resize your images (by deselecting the 'Resize Images' checkbox), then JuiceboxBuilder will simply copy your source images across to the gallery's 'images' folder.
Your original 4640px x 3472px images will undoubtedly look better then resized 1024 x 768px images but, when online, they will take much longer to load (as they will have a much larger filesize).
Getting your images to be the right size is a bit of a balancing act and a compromise needs to be reached between the image filesize (so that it is not too large for web gallery use) and quality.
Try resizing your images but with a higher resolution and a quality greater than 80%. A bit of trial and error might be required to reach a resolution/quality/filesize that you are happy with.

Incidentally, resized images do not retain any metadata (EXIF or IPTC) so if you want your gallery images to retain their original metadata, you'll need to resize them in an imaging program such as Adobe Photoshop or GIMP (a program that is capable of retaining metadata whilst resizing) and then feed the images to JuiceboxBuilder-Pro with the 'Resize Images' checkbox deselected (to ensure that the images are not resized again).

That is correct. A watermark embedded into a large image which is then dynamically scaled down to fit within the gallery's image area will look smaller than the same watermark embedded into a smaller image which does not need to be dynamically scaled down.

It sounds like post-processing your images manually and then feeding them to JuiceboxBuilder-Pro (with the 'Resize Images' checkbox deselected) would be the best way to go for your own scenario.

You are likely not seeing the 'large' images in your gallery.
As your gallery is always displayed in Small Screen Mode, the 'large' images will be used only when images are opened in new tabs via the 'Open Image' button.
In Small Screen Mode, 'small' or 'medium' images (but never 'large' images) are used for the main gallery display, depending on image availability (whether or not 'small' images have been generated) and the screen being used to view the gallery (regular vs retina).
The logic that Juicebox uses to determine which image size to use is noted in the Multi-Size Image support section.

Sorrry. We are starting to run two similar threads.

Do you want to lock one?

It might make it easier for you.

T

Thanks.

I have to admit Steven that the difference between the three words in upper or lower case escapes me. I must have read the instruction manual a dozen times over the last week and I still don't understand how the system works. Juicebox as a product is brilliant but when "LARGE" and "large" become importantly different I struggle.

For example when you and I first met less than two weeks ago you pointed me to a screen mode called Small so I could fill my thumbnail page with nothing but thumbs. It suited me because when I hit a thumbnail it produced a large image. You may call this a LARGE image or it may be, in your terminology a MEDIUM or a medium image. There you lose me. Why the screen mode is called small is a mystery when it produces 'big' pictures - but one that does not worry me.

Maybe sometime I may see the light - but in the meantime I want to muddle along with a Preset that gives me a good compromise of sharp colourful images that load comfortably on a relatively basic phone, tablet or PC. I'll stay the course and follow other posts in this forum and gradually I'll learn the niceties of the system,

Can you take a look at these two snips and let me know if I have chosen the best settings for my needs?

In fact I can see a difference if I change the jpg compression to 99 from 80

Thank you again, Steven,

I am getting to understand what the system is doing.

If I ask it to create a LARGE image it will use it “when opening image in a new window or when gallery is expanded.” I understand the new window but what do you mean about the gallery being expanded? I can’t see myself wanting the LARGE option but I might as well learn what it is for whilst this thread is active.

If I ask for a SMALL image you use it when the web folder is viewed on a small screen device and it has smaller pixel dimensions so it loads faster. Yes? In my case even loading my MEDIUM images on to a phone has never caused a problem – so I guess SMALL images are not for me (either).

With neither tick box for LARGE or SMALL being ticked I seem to be producing ‘images’ and ‘thumbnails’. Calling those ‘images’ MEDIUM creates a contradiction for me when your help page says “MEDIUM - Used in Large Screen Mode.” My web site is a Small Screen Mode website and it uses those MEDIUM images with no problem.

I wish I had never read those six words above because, as you said at the end of the last message “there will be only one set of images in your gallery (technically the MEDIUM images but don't worry about what they are called... they can be whatever resolution you want them to be) which will be used under all circumstances.”

Maybe I am the only person who has found this confusing but might it not help if you explained somewhere that the folder called ‘images’ contained multi purpose ones always and that it would have sub folders for LARGE and SMALL if requested.

Anyway I reckon we have done this topic to death now – and bored all your other more experienced users.

Yes, I had forgotten that adding the watermark necessitates processing. I will drop my 99% down to 90% and I admit that the original 80% was hard to differ from my new 99%.

Many thanks again. You have been very patient.

Tony

Thanks Steven.

I get wiser by the day - as far as Juicebox is concerned but you need to ask my wife about the rest of my life !!

I can't see myself embedding for my current needs but I see what you mean.

As regards SMALL images I am finding the normal ones load plenty fast enough so I won't be bothering.

Tony