Presentation Advice

Hi All

I have to give a presentation this week at work, traditionally people have used power point or a .pdf

I was going to create the document in corel then go down the .pdf route,

I was really wondering because  I need to shrink the document as much as possible as to what resolution images ought to be? currently I have tentatively turned them down to 200 dpi but the file is still huge, anyone have a recommended size?

the other problem I have is that some sheets are portrait or odd sizes, they seem to look ok in adobe .pdf reader in full screen mode so will pressumably be ok for the projector?

Now I know alot of this depends on the projector itself and to be quite honest I dont know anything about it, I think its fairly standard and its one of those that you plug into your computer and it beams the image onto one of those roll down/roll up screens.

thanks in advance




9 Replies - Latest Reply

  • In practice, it probably doesn't matter too much, especially if you are using mainly vector objects in your design. If they remain as vector objects in the PDF and you are running the PDF viewer in full screen mode, they will projected at the native resolution of the computer controlling the projector, without needing any special action.

    So, more important is to know the aspect ratio (4:3 or widescreen) and make sure your design page is a landscape page in the same ratio. 

    Stick to vector objects as far as possible.

    Any bit images will be resampled to fit, but provided your page size is somewhere near the same pixel size as the projector it will make little difference. I've yet to see a projector that's focussed well enough to tell whether resampling is occurring. But if you want to be sure, has some example resolutions. You can set the CorelDraw design page size to one of those sizes (using pixel units rather than inches or mm) and create your bit images in photopaint to the exact pixel size.

    [edited by: harryLondon at 7:01 (GMT -5) on Sun, Nov 13 2011]
  • In reply to harryLondon:

    Harry, you're back on the case

    unfortunately, most of the presentation is .jpgs or .pngs and I have found that turning any vector drawings into .jpgs or .png actually reduces the overall size of the document, I think this is mainly because we're talking about very complex vector drawings that have been exported from autocad, and it seems corel doesnt seem to like to handle these drawings too well.

    From what I understand, you're saying the projector will squash or resize the images to the same shape of the projector? 

    that's abit of a nuisance because alot of my pages are either portrait or of a strange ratio, ie some are square and some are photographic panormas so have a much narrower thin resolution.

    What would be your advice on this? some pages I should state I am completely unable to reorientate (those that are portrait) although I guess with the odd shaped ones I could put them on a standard landscape page and fill the empty space with a filled rectangle?

    I guess the only way to know is to either test it or talk to the IT guys at work, but the presentation is wednesday and theres ALOT to do....





  • In reply to n3v:

    oh woops, I've just realised I've out this in 'photopaint' instead of Corel Draw...

  • In reply to n3v:

    the projector will squash or resize the images to the same shape of the projector? 

    Not if you put them in a PDF page, as you said you were going to.

    In that case, it is the shape of the PDF page that matters. Which is why you need to choose a PDF page size that is at least approximately the same aspect ratio as your projector.



  • Resolution is a meaningless number!!!! Repeat until that is crystal clear.
    What is important is having any bitmaps at the same pixel size as the projector. That is very easy if the images are full page slides. Size them exactly the same as the projector. If they aren't full page, it can get a little more difficult. But if you set your rulers to pixels, it can be done. Since this is in the X3 group, I'm guessing you're using X3 which means you can't use the Pixel view added in X5. It could be useful for this project.
  • In reply to FosterCoburn:

    Harry and Foster,

    thanks for your advice guys, what I'm going to have to do is to lay the sheets out as  I want them sequentially and as a narrative, then I'll go and chat to the IT guys at work tomorrow and find out the resolution size etc as suggested, what I might end having to do is creating the slides the same size as one another but for the images that are odd shapes and sizes I will have to simply draw a rectangle the size of the page and colour it in black, (although the corel black never seems to match that in adobe reader), I guess I'm a tad confused on the whole because I've put together a tester .pdf of some of the odd shapes and they look fine in acrobat reader, its just how the projector will contort them I guess because I sort of presumed that they would look as they were on the screen? 

  • In reply to n3v:

    they look fine in acrobat reader

    Then you are probably OK.

    Acrobat reader in full screen mode will scale each page up or down so that it fits the screen, but it will not stretch it. Portrait pages will use only part of the screen width in order to maintain their correct shape.

    Non-proportional stretching will only occur if the projector has a different aspect ratio to the screen of the computer that is driving it. But that will not happen with a properly configured setup.

  • In reply to n3v:

    A black background would be good. If you are finding the "black" isn't the same, you are using the wrong black. You are designing for a screen so you MUST use RGB when designing and in the PDF. If you don't, things could shift and be quite ugly.
  • In reply to FosterCoburn:

    Harry and Foster, 


    I think your advice has done the trick, getting it together now, thanks again!