Tiki will automatically change the display mode to mobile when a mobile device is detected. You can in addition change to mobile mode or return to standard display mode manually with the side module that has been created for you in the column at the right-hand side.

Module in the right-hand side column

See as an example the documentation page https://doc.tiki.org/Mobile displayed in standard mode in a Tiki12 site:

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And the same page displayed in mobile mode:

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For more information, see https://doc.tiki.org/Mobile