Selection commands do not appear to work

Action Commands - Selection

Say This To Insert This Action
select all Select all
paste that Paste from clipboard
cut that Cut selected text to clipboard
copy that Copy selected text to clipboard
delete that Delete selected text
bold that Bold selected text
italic that Italicize selected text
underline that Underline selected text
strike that Strike selected text
indent that Indent selected text
outdent that Outdent selected text

So I don’t seem to be able to do ANY of these. Is there a video demonstration of this I could watch that might clear up what I’m doing wrong? I tried saying select all before what I wanted to select, and after dictating a line but it selects nothing. If I select text with my mouse and try to us the command it just replaces the text selected with the command.

Example:

I love you (I highlight it with my mouse, say bold that)

Bold that (replaces I love you)

In particular if I’m doing something wrong I’m open to creating custom shortcuts like the Caps on, caps off, but for bold on, bold off, underline on, underline off, italic on, italic off, if someone can show me how to do it that way, what I’d have to type in the SAY THIS box and the TO INSERT THIS box.