Just finished a project that was completely Jpg images.
The image file sizes were 960 x 720, this size did not fill the screen there was a gutter on both sides.
Do imported images need to be 720 x 486?
I resized the each image to 720 x 486 to fill the screen…About 300.
My other question is, is there another way to achieve a full screen image of the slides other than changing each individual slide?
Be sure the images are 72dpi. Also if the images were not made for video’s rectangular pixels they will still be distorted. A circle looks tall and thin. There is a formula for correcting this in photoshop. Let me know if you need it.
Using Photoshop create or bring your image into a canvas 720×576 @ 72dpi.
When working with higher res images I resize it at the higher res and drag it into the 720×576 canvas using trail and error until it looks right. You may need to create a border to keep the image in the safe area.
Once you are satisfied flatten the image and resize to 720×486, also change the canvas size to 720×486 (It will look distorted in Photoshop). Save as a jpeg and load it in trinity.