You can add an Intro image which will be opened each time a user enters your Tour.

Select Render WalkList Tours from the side menu and click the Edit button on the desired tour.

List Tours - click Edit button on desired tour

Go to tab Content / Intro (Desktop and Mobile).

Tour settings - Content / Intro tab for Desktop and Mobile

Upload the image you want to appear and set a time for which you want it to remain visible before it hides.

Click Save on top of the page.