To create an alternative jump or pop-up, Mif2Go produces a reference string from the hotspot text, which must match the reference string of the target topic. When you use a character (or paragraph) format to identify a jump or pop-up, the hotspot text string must be the same as the text of the target paragraph; Mif2Go depends on this equivalence. Because a reference string contains the full text of the target paragraph, and the acceptable length of a WinHelp reference string is very limited, this method is useful only for short pop-ups or jumps to short headings.