Headline and headings will not center. . . .

Folks: Always grateful for support. . . .

I've been through all the GPP support docs I could find. Whenever I set <Inline Width> it left justifies the Headline. I also tried using the heading 1, and it made no difference.

I tried this CSS snippet:

H1.entry-title {
text-align: center;
}

I tried this CSS snippet:

h1.entry-title {
text-align: center;
}

I tried this CSS snippet, too:

h2.entry-title {
text-align: center;
}