Title and description
With a slide selected, the center area shows the slide preview. Click into the Title or Description (optional) areas to edit them. Changes are saved as you type. If a slide is required, a red asterisk (*) appears next to the title.
Text slides: response placeholder
For Text slides, there is also a response field. The text you enter in Placeholder for text input is what respondents see inside the empty box (e.g. "Type your answer here"). The arrow button on the right is for submitting or moving to the next step in the live form.
You can set a Character limit and Field type (single line or multi line) in the Properties panel—see Text slide options for details.