To correctly use the slideshow page, you need to understand the underlying function. In our slideshow, all pictures are scaled to 940 px.
Due to this, you need to ensure that all pictures you provide for the slideshow have the same ratio (e.g. 2:3). If a picture has a different ratio, the slideshow will overlap. Please also keep in mind that ratios do not translate directly, e.g. a 2:3 ratio is not the same as 3:2. If you want to upload photos in portrait format to the slideshow, you first need to edit them accordingly.
This can be achieved by cropping the photo or by compiling multiple photos into a single collage with a new, different ratio.