During design process the technical needs of certain typographic fractions were examined.

The capital letters were designed with certain purpose: it's modern proportions (derived from Didone fonts) with optimised inner lights as well as short ascenders and descenders work very well within titles and leads. Except of wide range of opentype features, Geller contains bullets & dingbats providing many possibilities in introduction of entry points in editorial design. Compact diacritics, proportionally tall x-height, narrow letter construction – all this designed features make typesetting of narrow text columns and spreads economical.