NEWBIE Writer uses of tab key in outline

Following all that I know (MS WORD) I began an outline. Using the Tab key, I could use the outline as it gets smaller. IE I could develop an outline that goes I, i. But when I want to make a II entry, I don’t know how to do that. Is this question clear enough? Basically, I"m trying to “reverse” the direction of the outline.

SHIFT+TAB to go up a level (same as going backwards in a table using the tab key). Or use the arrows on the the Formatting toolbar next to the Number List icon.

Thanks for your answer. I should have remember the SHIFT + TAB technique. Thanks for taking the time to answer.