After you have implemented your MyCashflow theme's checkout, it must be enabled in the theme.

Initially, the theme settings must indicate support for all implemented checkout types. To do this, add the SinglePage/MultiPage element (depending on the checkout type) into the theme settings file's /Theme/Features/Checkout element.

Below is an example of a settings file:

<Theme>
    ...
    <Features>
        <Checkout>
            <SinglePage supported="true"/>
            <MultiPage supported="true" default="true"/>
        </Checkout>
    </Features>
    ...
</Theme>

If the single-page checkout template is missing in a theme and theme settings are <SinglePage supported="true" />, the MyCashflow default theme's single-page checkout will be used instead.

After checkout support information to the settings, select the checkout used by the online store in the store version form under Checkout type.