Vesper: OpenType Features
There are many OpenType features built into Vesper. The Basic version contains a few simple ligatures, and lining and old style figures. The Pro versions have all the "extras" for complex typographic tasks.
Some of the advanced features found in the Pro fonts include: small caps (smcp, c2sc), petite caps (pcap, c2pc, ss03), lining figures (lnum), tabular figures (tnum), fractions (frac), superiors and inferiors (sinf, subs, infs), discretionary ligatures (dlig), contextual alternates (calt), and case-sensitive forms (case).
These features are extremely useful in academic and scholarly texts, charts, graphs, newspapers, or other complex sets of information. For those of you simply needing to set some 'normal' text, the Basic fonts should work out just fine.
There are not only all the standard "f+i" and "f+l" ligatures, but also more refined versions for very specific troublesome combinations. Many of these act similarly to the 'calt' feature – they are meant to make prettier letter combinations. But since not all applications support the contextual alternates, these ligatures will also help to subtly beautify your text.
You are probably used to seeing contextual alternates used for flashy substitutions in script fonts. Vesper's alternates are the complete opposite. They shouldn't even be noticed; the reader won't see them their, but will get a subconscious feeling of the text being smoother and easy to read. More on this special feature here.
Proportional old style numbers are the default set because of working the best in running text. But for other times/preferences there are also lining figures (and small cap lining figures). All three of these number sets contain tabular (fixed width) versions for use when making tables or long lists of numbers.
Small & Petite Caps
Small caps should be considered a standard addition to any typographer's tool box. All Vesper Pro fonts (yes, even the italics) contain not only small caps, but also petite capitals (smaller small caps that align with the x-height). These obscure, miniscule-majuscules are just waiting to be put to creative use.
Most punctuation comes in multiple versions for different typesetting scenarios. When setting all caps, there are raised versions for proper vertical alignment. Even the small caps have specially reduced versions for correct optical proportions.
We've also thrown in a large collection of contextually-aware double & triple quotes and guillemots to add a bit more refined style to your text. The quotes work for both '69' & '96' settings, and the guillemots can point inside or out. Of course they have case versions as well...
Our fractions are clever. They know how to convert any combinations of numbers into correct fractional forms. No need to worry about fractions anymore, just enable the feature and let it do its thing.