{The design of the \acro{HINT} file format} {Martin Ruckert} {The \acro{HINT} file format is intended as a replacement of the \DVI\ or \PDF\ file format for on-screen reading of \TeX\ output. Its design should therefore support the following features: reflow of text to fill a window of variable size, convenient navigating of text with links in addition to paging forward and backward, efficient rendering on mobile devices, simple generation from existing \TeX\ input files, and an exact match of traditional \TeX\ output if the window size matches the paper size. In this talk, I will present the key elements of the design, discuss past and future design decissions, and demonstrate the new file format using a working prototype.}