I'm working on a site on Muse CC and I'm having issues with its mobile layouts.
I've worked with Muse since CS6, and didn't have any issues with any format of layout. So whether this is unique to me or a CC issue, I'm not sure.
This is the Master of the mobile site:
As you can see, I'm setting up the Menu/header for the site. But when I preview the site, it shows this:
The page appears to narrow and elements on the right hand side are shunted further right and off the page. What's there also becomes larger on the page in the preview. I was working on a tablet layout also, and elements got bigger and unaligned. So there appears to be weird spacing/sizing issues that I can't fix.
I've tried lowering the page width to what it appears to be in the preview (min is 320, max is 380 in the screenshots, which is default), I've tried pinning elements in various ways, resizing both elements and page, but nothing seems to stop everything getting shunted off the page. Putting things closer to the centre of the page will push it to a vaguely appropriate area, but it's difficult to design that way - difficult too to design when what you see on the design screen isn't what's actually going to happen.
I should also be mentioned that the centred text in the button (it's an accordion) isn't actually centred, that's pushed off to the right too for some reason.
Any advice/help so I can fix this?
Let us have a look at your .muse file. The master, you have shown us, and a blank layout page is enough.
Upload the file to Dropbox or a similar service and post the download link here. Then we will see.
An average portrait phone viewport is only 320px wide, not 380.