An image slider is a great addition to your design. If you want your images to fit the image slider perfectly, make sure to upload them in a suitable size.
Here are the preferred sizes of the image slider images according to the theme you are using.
- Neutral theme: 1400 x 686 pixels
- Spotlight theme: 1400 x 412 pixels
For more information about the image slider and the page content in general, read the article Editing the content of a page.