i do have a button screen. The buttons are loaded, including the images. However the background cannot be changed, the size cannot be changed. I could do this perfectly in BT, but in BT server it does not work. Any ideas?

It may be a bug in BT Server, and I had the same issue. The way I solved it was to modify the global theme for my app. Once I did that, I was able to change background and button sizes on my button screens. Not sure the relationship and why that worked, but it did.

Hmm...haven't heard of this. If the background won't load...help me understand this: Are the setting in the Global Theme being ignored or are the settings in the Button Screen's Advanced Properties being ignored? Also, iOS or Android or both?

Setting in the button screen's advanced properties are ignored. This is for iOS (at least so far). If I modify the global theme, for instance add a default background or color, then the button settings work. Weird.

Good info...looking. It's either... a) Control panel honors settings (remembers them) but BT_screen_menuButtons.m ignores them. b) Control panel does not honor them (forgets them) so BT_screen_menuButtons.m never gets them. c) Control panel honors settings, BT_screen_menuButtons.m tries to read them but fails. C seems logical. It's been awhile since I looked at the code for the button plugin, I'll re-visit it.

I changed the Global Theme background but still no effect. It looks as if the settings are ignored.

I think this is figured out. a) Look at your app's Configuration Data using the control panel. b) Look for the "BT_themes" part of the config data. It should look like this (it may have more properties)... {"itemId":"01DA97D11B6AC8C50FB0F3E", "itemType":"BT_theme", "backgroundColor":"#FFFFFF", more properties could be here...} but it could look like... {"backgroundColor":"#FFFFFF", more properties could be here...} The difference is huge. The first example has an itemId and an itemType. The second example does not. This is the problem. For a few weeks now, new v2.0 apps using the default theme have had this error. This is / was a typo on our part and has been fixed. But, if you're dealing with an app you've already created, you'll need to re-create a theme then set that theme as the apps theme (remove the original). Overriding the themes values in the screens advanced properties did not seem to fix this. @MGoBlue idea of modifying the existing theme could have worked but it's better to remove / replace the theme. Wowza, two entire days to find that thing!

This is how the string looks like: "BT_themes":[{"itemId":"E1D1F37AFD7B07067930AC2", "itemType":"BT_theme", "itemNickname":"Default Theme", "splashScreenItemId":"", "statusBarStyle":"default", "navBarStyle":"solid", "toolbarStyle":"solid", "backgroundColor":"#FFFFFF"} Should this work?

That should work. If it does not, check the JSON for the screen itself (lower in the JSON data). Make sure the screen itself does not also use a backgroundColor, if it does, the screens backgroundColor will override the themes background color.