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PowerPoint

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La revisió el 14:15, 3 gen 2009 per chris collman (discussió | contribucions) (See page comments)
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PowerPoint is the presentation component of the Microsoft Office suite. This program's intent is similar to OpenOffice Impress or Apple's Keynote. While this page will talk about PowerPoint, many of the suggestions apply to other presentation programs.

Reducing file size for the web

Reducing the overall file size helps any presentation be more user friendly on the web. Not all users have high speed internet access or the latest and greatest fastest computers in the world. Some basic steps for reducing the size of PowerPoint or other presentation files or pages:

  • Don't use large images - 1024 pixels wide by 768 tall is an upper limit. Remember different computers will have different screen settings.
  • Do re-size any image to the size you are going to use in your presentation. That 1024x768 image which displays at 102x76, just could be kept by the program at the larger size.
  • Don't 'allow fast saves' - this option only appends new content to save time, it doesn't remove deleted material
  • Be careful about a cut and paste of an images from other programs. Images might not compress.

Exporting to different formats

HTML

One aspect of developing any presentation often overlooked is the ability of most such products (including presentation applications in MS Office, OpenOffice and iWorks) is the ability to export to a web based presentation composed of html and gif images. The web export features have a variety of options that offer quite a bit of control in producing the output and mimic the presentation application experience.

For a Moodle, this means that you can export your entire presentation to a set of files in a directory, upload the directory to the Moodle, and point the student to the index page of the presentation in a new window. The export process provides options for frames and buttons as well as the ability to save a variety of design schemes. The presentation can easily include links to other resources and once created the author, in as much as this is html based, can easily integrate a variety of other materials without having to republish.

Flash

There are several commercial plugins that can export powerpoints as self-contained Flash movies. These may be smaller than standard powerpoints, though file size reduction can also be achieved without converting to a different format. OpenOffice's Impress and Apple's Keynote both have this functionality built in. Not all of the more advanced features of PowerPoint will transfer across (e.g. certain animations and sound effects).

It is possible to convert PPT to SWF online at site like Zamzar - http://www.zamzar.com

Rich Text Format (.rtf)

You can save a PowerPoint presentation in Rich Text Format by selecting 'Outline/RTF' in the filetype dropdown after selecting File > Save As. In doing so you will lose all images and graphics and create a text file that can be opened in Word or PowerPoint, amongst other applications.

Portable Document Format (.pdf)

PowerPoint on Mac OS X allows you to export to PDF via Apple's standard print dialog.

PowerPoint alternatives

You do not need a copy of PowerPoint to merely view presentations. Microsoft makes a viewer program available for use on Windows and Mac OS X. The freely available OpenOffice Impress is available for Windows and Linux and adds the ability to create presentations in PowerPoint compatible format, amongst others.

PowerPoint Viewer

The PowerPoint Viewer is a free download from Microsoft, but note that even this program does not have full compatability with all PowerPoints created with recent versions of the full program.

PowerPoint Viewer 2003 for Windows.

Apple's Keynote

Part of Apple's iWork office productivity package (along with Apple Pages). Can open and save PowerPoint compatible files as well as saving in its own format and allowing export as PDF, Flash and Quicktime movies.

http://www.apple.com/iwork/keynote/

OpenOffice Impress

Part of the free and open source OpenOffice office suite. Can open and save PowerPoint compatible files as well as saving in its own format and allows exporting as Flash and PDF.

http://www.openoffice.org/product/impress.html

Moodle Presentation Modules

There are several standard and addin Resources/Activities that will allow you to create presentations within Moodle.

It is possible to create a series of lesson activity pages with material extracted from simpler PowerPoints. See Import_PowerPoint.

Slideshow which has a focus on images, in the manner of a slide projector.

Simple presentations a.k.a. Slideshow module based on Eric Mayer's S5 format, for creating slideshows using HTML.

Presentation module, another HTML based tool, which has its own page of documentation.

PowerPoint accessibility

Most accessibility guides suggest that if you put PowerPoints on the public web then you should also include an accessible HTML format version for those who do not own PowerPoint. For documents published in the enclosed space of a Moodle course, it may be easier to ensure that all your students have access to PowerPoint (or a compatible program) since generating accessible, or even simple standards compliant HTML from PowerPoint is a complicated task.

There are commerical tools available that can help you with the task of creating accessible HTML versions of PowerPoint presentations.

PowerPoint problems

Edward Tufte argues in his book Beatiful Evidence that PowerPoint, even if used well by competent presenters, has some inherent flaws for the effective transmission of knowledge. The chapter, available separately as The Cognitive Style of Powerpoint: Pitching Out Corrupts Within, argues that "[PowerPoint-style software] often reduces the analytical quality of presentations. In particular, the popular PowerPoint templates (ready-made designs) usually weaken verbal and spatial reasoning, and almost always corrupt statistical analysis" and goes on to ask "What is the problem with PowerPoint? And how can we improve our presentations?"