The PDF page width limit is 200 inches. This is an industry standard limit, not one imposed by Legacy. Click on Appearance and experiment with the settings for Themes, Box Items and Sizing Options. The right combination of font sizes and spacing, etc. can change the size of your chart significantly. You can also use the “drag” buttons in the tool bar on the left side of the program to change the position of boxes so they don’t fall across page breaks.
Please keep in mind the Legacy Charting is program designed to created large wall charts. It is not generally suitable for charts you want to print on a single sheet of regular paper.
