Settings BORDERIn the last step, when your images are uploaded, you can affect the appearance of the border around your slider or suppress it completely. Just look where the red arrow points to.
You may adjust the color of the border as well as the width of it (px). If you don't want to have a border, just fill in “0” for border with.
Furthermore there is a box to add a value for the radius of the corners. If you want to have completely round corners as shown on the picture here, add the half value of your sliders height.
If your slider is higher than the width, add half of the value from the width. Always use the half of the smaller value (width * height).
After pressing the green update button you see the result and can download the slider-file.
Feel free if you want to leave a comment: