Answer:
Home Tab, Paragraph Group and Multilevel Icon.
Explanation:
The Tab on the Ribbon is Home, and the group is Paragraph. And there you will find the Multilevel Icon. Just select the one from it that suits you.
And for increasing the indentation to one more level Press Tab
For Outdenting, press, Shift+ tab
For adding an item at any indentation level, go to the last word, and press enter. And to opt-out of that indentation level, press enters two times.
Now transfer the insertion point to the last of the last most item in the number list, and then enter (press). and then press Del. or you can hit Enter and finally tap on the Numbering button, which you can find in the same tab( home) within the Paragraph group, and from there you can put off the number formatting.
