@barb: You’re using one-column no sidebar layout so, the width of the content seem bit smaller. You can use other layouts i.e. sidebar-left or sidebar-right. Or if you prefer to use full-width with no sidebar layout, I recommend you to upgrade to pro version.
But if you want to change the view in free version itself, go to “Dashboard=> Appearance=> Customize=> Theme Options=> Custom CSS” box and add the following CSS:
.one-column .site {
width: 1000px;
}
@media screen and (max-width: 1024px) {
.one-column .site {
width: 960px;
}
}
@media screen and (max-width: 990px) {
.one-column .site {
width: 910px;
}
}
@media screen and (max-width: 960px) {
.one-column .site {
width: 720px;
}
}
@media screen and (max-width: 767px) {
.site, .one-column .site {
width: 600px;
}
}
@media screen and (max-width: 640px) {
.site, .one-column .site {
width: 460px;
}
}
@media screen and (max-width: 479px) {
.site, .one-column .site {
width: 100%;
}
}
Regards,
Mahesh