How to make mouse controller just as TopDownCharacter tutorial map

I am currently trying to learn something from TopDownCharacter map. What I don’t understand are mouse controller and green circle thing for cursor. Therefore i have two problems;

  1. When i create a blank project, mouse is invisible and using for looking around. In TopDownCharacter project, mouse can be used for choose destination. I cannot find where the settings are.
  2. green circle thing is in the TopDownCharacter bp class, but it appears where the cursor is and i cannot find codes or settings for it.

Hopefully, i have explained my problem properly. sry for bad english i dont know whether i use true words