My question is this — and I have yet to find any research on the subject — with an image slider, where the text and photography will be different from slide to slide, what’s the better practice?
Should the call to action button be placed on the image in the best place for it given the text and photo, or should we try to design each image so that the call to action is in the same place on each image? I struggle with this, because I could put the call to action in the same place on most slides, but some images just won’t accommodate the button in the same place every time.

But what’s more user-friendly? Seeing the button in the same place on each slide, or is it OK for it to move since only one image will be displayed on screen at a time? Is there benefit to the unexpected location of the button, or is it a detriment?

By the way, I also struggle with whether the typography should be the same from slide to slide, or whether it should be chosen in context with the content. I started by limiting myself to a few font pairings, but now I worry that I should just choose one headline font and one subtitle font for all slides. The problem is that our content varies so much, that the individual sliders look better — communicate better — when I’m not consistent!