On the Leader Structure tab, we again have lots of settings, but the settings we will discuss here are Maximum leader points and Scale. Maximum leader points will determine the number of points required to make the leader line. The Scale option will increase the overall scale of the leader line, and by doing so, we will essentially make everything in the leader line, such as the arrow size and the text, bigger or smaller. So, if your leader arrow and text look too small or too big, then change the value of Scale to fix it:

The last tab on the Modify Multileader Style window is Content, and from this tab, you can change text-related settings.