You can now show the live overlay so guests can position themselves based on the template they are using. You can enable this by ticking this option under each template you have uploaded.
Please note the above is the live view, the final product will show the text correctly.
You will need to configure this per template by going to the specific template and clicking either the "Edit" button under the template (for photos) or the "Time" button under the template (for Gifs and Bursts).
Then, for still photos, you will see the option on the top to enable "Show overlay preview" and "Do not mirror live view".
Then, for Gifs and Bursts, you will see the options listed to enable "Show overlay preview" and "Do not mirror live view".