How to indent and outdent multiple selected bullet pointed lines?

_ • How do I indent …
__ • and outdent …
___ • … all three of these incremental bullet pointed lines at once?

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__ •
___ • How do i indent and outdent the following four lines; notice how they share the same level.
___ • 1
___ • 2
___ • 3
___ • 4

I know that Tab indents a single line. I know that Shift Tab outdents a single line. But how do you outdent and indent multiple selected bullet pointed lines, or even normal lines?

I tried using tab and shift tab on all the lines selected at once, and it just clears them.

What about using the ruler (Format > Ruler)? You can select all lines at once and drag the left indent to where you want the bullets to start.