Make preview size for PowerPoint same as other worship items (lyrics, Google Slides)

(This is a pretty minor issue, but I have been looking for a solution nevertheless.)

When we use PowerPoint slides in our services, the preview sizes (the "thumbnails") for the slide pages are a lot bigger compared to the other worship items.

So even if I set the "zoom level" to show 4 pages per row, when we get to the PPT slides, they are so big that it only fits 2 pages per row.

I can use the "zoom" slider on the bottom to change the preview size, but then that also affects the other non-PPT slides and makes them even smaller.

Is it possible to make the sizes for PPT slide previews more similar to the other slide types? (Same width at least?)