This seems like it should be simple, but I can't get the setting to stick. I want new documents to open with a solid background color by default. I've opened a new doc, gone to tools>options>document, set the solid background I want, then check save options as defaults for new documents. But when I then open a new document, the background setting is back to "no background". Am I missing a step to make the background setting standard for all new documents?