PowerPoint is the most commonly used presentation software and is available on all Trinity College lab & classroom computers. It should be noted that users can choose to download Artstor image groups as PowerPoint presentations, with a slide automatically created for each image in the group, and a title slide created using the name of the group.
A jpg image file of 1024x768 pixels, at 72dpi resolution, is commonly recommended for use in PowerPoint presentations. This is the output resolution of many projectors.
Inserting an image into a PowerPoint slide:
1 First open your presentation and select the desired slide.
2 Click on the "Insert" menu
3 Select "Picture", "From File..."
4 Navigate to where your image is located, and click on the filename.
5 Click "Insert"
6 PowerPoint will insert the image in the middle of your PowerPoint slide. If the image is too big and fills the screen, click on the page zoom button & choose a small number, enabling you to zoom out to see the entire image. 
7 To scale the image without distorting it, click and hold with the left mouse button on any one of the corner "handles" & drag the handle to re-size the image smaller or bigger.