You can add a powerpoint presentation using the File Tile. Drag and drop a File tile from the Tile Library into your ePoster (1) and then click in the Add File box (2) in the Settings area and add the powerpoint file from your computer.
Learning Toolbox will automatically convert your powerpoint presentation into a PDF file so that it can be viewed inside the PDF viewer within the Learning Toolbox app or within any web browser. This conversion takes a little time and there will appear a message telling you it is being processed (3). When the processing is finished then you will see the first slide in your presentation appear as the image on your File tile. You can edit the tile title and the tile image (as usual) if you want to change them.