Create the following folder:

mkdir -p ~/.config/alacritty

create the config file:

vim alacritty.toml

Paste this into the contents of the config file:

# $HOME/.config/alacritty/alacritty.toml
# by Rito Ghosh 2023-10-06

# Alacritty now uses TOML formatting for its config files.
# This is a simple example.

# There are the specification here: <https://github.com/alacritty/alacritty/blob/master/extra/man/alacritty.5.scd>
# It is not obvious how it translates to TOML. But it is extremely straightforward.

# example: WINDOW, COLORS, etc. are tables, and should be represented as [window], [colors], respectively.
# specifics of variables go under them. e.g.- look under "dynamic_padding" under-
# <https://github.com/alacritty/alacritty/blob/master/extra/man/alacritty.5.scd#window>
# write `dynamic_padding = true` (without backticks -`) under the table [window]
# for variables with multiple values, use "dotted keys". Like setting `padding.x = 5` under [window].
# This is simple. If not clear, do several trials and errors.

# Below is my initial set-up. The TOML homepage (<https://toml.io/en/v1.0.0>) was very helpful in figuring this out.
# I put the file alacritty.toml in $HOME/.config/alacritty. However it can be kept anywhere among the places mentioned in
# <https://github.com/alacritty/alacritty/tree/master#configuration>

[window]

opacity = 0.9

padding.x = 10
padding.y = 10

decorations = "Full"
decorations_theme_variant = "Dark" # "Light"
startup_mode = "Maximized"

[font]

#normal.family = "Cascadia Code PL"
#bold.family = "Cascadia Code PL"
#italic.family = "Cascadia Code PL"
#bold_italic.family = "Cascadia Code PL"

size = 10.0

# Tip: for inspiration, look for values in the source code files of your favorite VS Code themes, and use the color picker in
# Google to test colors before setting a value, or simply using an editor such as VS Code where colors are displayed in a
# small box when a HEX is detected by the editor.