Changing Next Icon in Content Manager Courses

Summary

Users don't know what to do. I am wondering it it's possible to change an icon so it's more visible to users

Content

While most of our courses are built in Storyline, we have some esignautre policies we create in Content Manager. We have been finding that a small but significant portion of users do not see the next button to advance to the esignature. Is it possible to edit either via CSS or another way to change it to something else? "Click to eSign" would probably clear it up.