full_power

Hello,
this really depends on the theme you chose, but you could go with a 960px width,
and a height that doesn’t crop too much of your image. This is only if you want a full-width slider, of course.

The best thing for you, if I understand correctly your problem, would be to build a child theme with your custom css, since you kept your css safe, right?
So you could force WordPress to use your css, instead of trying to use the theme settings that don’t seem to work.

Hello linkomatic,
you’ll have to find the child tabs declaration in the css, and add
display: block;
on the hover state.
So that will look like :

.child-tabs:hover {
display : block;
}

I hope this helps.

Hello Otis,
I’ve never tried the Google Fonts plugin, but always did the changes myself inside the CSS. Did you check all the boxes when using the plugin (header 1, header2, etc.) to see what happens? You may have chosen the wrong element.
Preventing the shading change shouldn’t be a problem, but could you send a link to your website so it’ll be easier for everyone to figure out where to operate the changes?
Thanks.