This will allow you to see if you have exceeded the 1 inch margin. If you need to adjust the size of an imported picture or logo, hold down the Shift button and click and drag on one of the corners in order to scale it proportionally. This will keep it from being distorted. Do not allow imported pictures to hang over the edge of the poster. Use the picture cropping tool or scale the image down proportionally.
Pictures imported from web sites are low resolution images.
These images are for on-screen presentations and web page use only. Save the image as a high quality JPEG file. Do not enlarge the images once they are inserted into PowerPoint. If the image will be used larger in the poster then the original, it should be enlarged when scanning to the size it will be used in the poster. Scan the original at a higher magnification or resolution to make up for the size difference.