Perquisites:
1. Installation of Liquid UI app on the iOS device.
2. Installation of Liquid UI License.
3. Connection to SAP R/3 Server (even demo.guixt.com can be used).
Steps to select a different theme for Liquid UI iOS:
Step 1: Login to the SAP R/3 connection.
Step 2: Select the right bottom corner of the screen @ SAP Server Name
Step 3: A bubble with a list of entries pop's up.
Step 4: Tap on "Theme Selection" entry.
Step 5: Another pop up appears with a dropdown list of different themes.
Selected / highlighted is the current theme.
Step 6: Select any other theme from the dropdown list, and Tap on OK.
Step 7: The new theme is applied on to the Liquid UI iOS screens.
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see the attachment for more details