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Add a note about patched NERD fonts to the FAQ entry on fonts

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Kovid Goyal 2021-12-20 08:19:42 +05:30
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docs/faq.rst
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@ -193,12 +193,21 @@ kitty is not able to use my favorite font?
---------------------------------------------
|kitty| achieves its stellar performance by caching alpha masks of each
rendered character on the GPU, and rendering them all in parallel. This means
rendered character on the GPU, and rendering them all in parallel. This means
it is a strictly character cell based display. As such it can use only
monospace fonts, since every cell in the grid has to be the same size.
Furthermore, it needs fonts to be freely resizable, so it does not support
bitmapped fonts.
.. note::
If you are trying to use a font patched with NERD font symbols, dont do that
as patching destroys fonts. There is no need, simply install the standalone
NERD font, kitty should pick up symbols from it automatically, and you can
tell it to do so explicitly in case it doesnt with the :opt:`symbol_map`
directive::
symbol_map U+23FB-U+23FE,U+2B58,U+E200-U+E2A9,U+E0A0-U+E0A3,U+E0B0-U+E0BF,U+E0C0-U+E0C8,U+E0CC-U+E0CF,U+E0D0-U+E0D2,U+E0D4,U+E700-U+E7C5,U+F000-U+F2E0,U+2665,U+26A1,U+F400-U+F4A8,U+F67C,U+E000-U+E00A,U+F300-U+F313,U+E5FA-U+E62B Symbols Nerd Font
If your font is not listed in ``kitty list-fonts`` it means that it is not
monospace or is a bitmapped font. On Linux you can list all monospace fonts with::