I have WebDesigner Premium and have just created a new site. Most of it was done, but on one page I needed more length. So in the menu 'Page size', I am offered the options of 970, 760, 640 or Custom. It seems like if you want to change page length here you have to choose custom, because with all the others, width and height are greyed out.
When I started with this site I chose 960, but since I chose custom for one of my pages, the width seems to be different than all the other pages.
What do I do to get the page width on the whole site the same again, but leaving the lengths as they are now? I know now that one can drag page lengths up or down, but that doesn't make the widths all the same.
I use Windows 10, latest version and the latest version of WebDesigner.