I’m just writing an article about how show or hide widgets on select pages, but it also depends if a theme offers a full-width page template. However, I see you are using the Twenty Sixteen theme, which does not offer a full-width page template, otherwise, it would be as simple as changing the template for the page(s). Because this theme has no full-width option, we need to override and change the layout styling for a specific page by adding some custom CSS code to the Additional CSS tab of the customizer.
Basically we will be overriding the theme’s own styling. For your About Page, copy and paste this:
@media screen and (min-width: 56.875em) {
.page-id-116 .content-area {
float: none;
margin-right:0;
width:100%;
}
.page-id-116 aside#secondary {
display: none;
}
}
Try this out and see if it works for you.
