How do I skip a lesson w/Destination button and mark complete?

Like Chris said, this is easy and depends only on how a course submits completion to the LMS. I personally try to avoid using the “percentage of slides” method if I ever can, but it’s trivial to create a trigger that submit it when the user reaches a certain slide or clicks a certain button (such as the button that takes them to the final slide.) The ideal solution will depend a bit on how your particular content functions.

If you mean something else by wanting the skipped lesson to show as completed, such as showing completed in the sidebar menu or on some custom table of contents, again that depends on your particular course, and may have more or less complexity, but the if you’re speaking about the course sending SCORM completion, that’s entirely up to you and how the course is developed.

If you’re able to share more, such as the course file itself, a more exact solution can be offered.