The phrase "right arrow" refers to a symbol that points towards the right direction. It is commonly used to indicate movement or progression from one thing to another. Full definition
Use left and right arrow keys to scroll through schedule. (myintimcity.com)
It expands once you start typing, and from there you can hit the new right arrow button to jump back to the photo and audio message buttons. (venturebeat.com)
Click on the first image to bring up the browser, and then scroll through the images using your left - right arrows on your keyboard. (landof10.com)