Although **Plus, Pro and Expert** sets provide extensive language coverage there may be particular design cases where additional characters would be helpful to have.
Here is a list of popular ligatures that are recommended for addition on a case-to-case basis:
f_b
f_f_b
f_h
f_f_h
f_j
f_f_j
f_k
f_f_k
f_t
f_f_t
c_k
c_p
e_t
l_l
s_p
t_h
t_t
t_z
Armenian Dram currency symbol is a recommended addition to any Cyrillic-supporting fonts, due to popular use of Russian in Armenian community
The Google Lating Plus encoding includes **ẞ Germandbls U+1E9E**.
Does your font include Small Capitals?
For better compatibility you may consider adding the germandbls.calt glyph to access ẞ U+1E9E in Small Caps fonts. In Glyphs go to *Glyph > Add Glyphs*, and paste this code:
Germandbls=germandbls.calt
Add this calt feature:
sub @Uppercase germandbls' @Uppercase by germandbls.calt;
sub @Uppercase@Uppercase germandbls' by germandbls.calt;
Recommended links for further reading:
* [How to draw a Capital Sharp S](https://typography.guru/journal/how-to-draw-a-capital-sharp-s-r18/) by Ralf Herrmann
* [Localize Your Font: German Capital Sharp S](https://www.glyphsapp.com/tutorials/localize-your-font-german-capital-sharp-s) by Rainer Erich Scheichelbauer
N.B. The question of German Uppercase Capital Sharp S is still highly debatable, and its usage hasn't passed into the official orthography.
