Usually, only the largest format is complete, with the other formats dropping or cropping one or more panels. Such "throwaway" panels often contain material that is not vital to the main part of the strip. Most cartoonists fill the first two panels of their strips with a "throwaway gag," knowing that the public may not see them, and making them integral to the plot would likely be wasteful. Exceptions to this rule include "Steve Canyon" and, until its last few years, "On Stage", which are complete only in the third format. An alternative is to have a separate strip, a "topper" (though it may appear at the bottom), so with the topper it comprises a three-tier half-page, and without it comprises a two-tier third-page.