Creating space between subpages

Can you post your link and explain problem in more detail ?

I want to have more space between the submenu pages since they are too close together.

https://oi57.tinypic.com/28tgb2b.jpg

Can you help, please ?

Do you mean the space between the links..?

1. Course-1 Introduction

2. Course-2 Fundamentals

If so, we cannot find out its css properties from the image.
Try adding more padding or margin to each item.

Where exactly are these margins and paddings ?

https://www.physiquementoring.com/