Glyph Master is a NPC found in the major cities(Velika, Allemantheia, Kaiator and Highwatch) that sells Glyphs and adjust them. Visiting Glyph Master was previously necessary to adjust glyphs character has.
This was changed early in game. Already in late level 60 patches glyphs can be changed directly from menu and visiting Glyph Master is unnecessary. Also while leveling glyphs are unlocked automatically, for a fee. Also in later patches Passive Glyphs were also added for various game balancing features and work without having to be activated every time.
Currently there 5 sets of duplicate Glyph tables - save settings built into your avatars K Menu. There are also 5 duplicate sets of Equipment - save settings in your P Avatar paperdoll. Note the Glyph table has to be changed manually while the Equipment setting can be set to hotkeys under O.