A simple way to add a site is to click the X over the thumbnail for a site you don't want. Once it's gone, a new site will take its place, so you can keep clicking the X until it shows the site you want.
I know that's one way of doing it. I did do it that way originally, but I was clicking the x button to fast and the site I wanted to save went right past my eyes. So, it's gone now.
A simple way to add a site is to click the X over the thumbnail for a site you don't want. Once it's gone, a new site will take its place, so you can keep clicking the X until it shows the site you want.
I know that's one way of doing it. I did do it that way originally, but I was clicking the x button to fast and the site I wanted to save went right past my eyes. So, it's gone now.
In which case, click the little arrow icon in the top-right corner and choose Restore all removed thumbnails. Anything you've clicked through will have a chance to be seen again.