Ubuntu – How to increase window title font size

This option is saved in ~/.config/Foxit\ Software/Foxit\ Reader.conf, size of UI font is defined by Linux%20Font= , there you can set this value manually, but only in range 13-15. When you set it higher Foxit assumes it is 14 (at least in my case).

to change the gnome-terminal font size via command line,

1. first we need to know the current profile id of the gnome-terminal. I am using the default one which is named as "Unnamed"

in my case the profile id is something that is starting with "b1dcc9"

2. Custom font square must be ticked.

3. run the below command to get the list of profiles
   gsettings get org.gnome.Terminal.ProfilesList list

Example:

$ gsettings get org.gnome.Terminal.ProfilesList list
['b1dcc9dd-5262-4d8d-a863-c897e6d979b9', 'd2a064f8-146d-45b5-8da7-d7e2f34da77e', 'aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa']

I already know that my current profile is something that is starting with "b1dcc9"

4. get the font name and size with the below command gsettings get org.gnome.Terminal.Legacy.Profile:/org/gnome/terminal/legacy/profiles:/:b1dcc9dd-5262-4d8d-a863-c897e6d979b9/ font

Example:

$ gsettings get org.gnome.Terminal.Legacy.Profile:/org/gnome/terminal/legacy/profiles:/:b1dcc9dd-5262-4d8d-a863-c897e6d979b9/ font
'Noto Mono Bold 12'
$

5. Set the font name and size with the below command gsettings set org.gnome.Terminal.Legacy.Profile:/org/gnome/terminal/legacy/profiles:/:b1dcc9dd-5262-4d8d-a863-c897e6d979b9/ font 'Ubuntu Mono Italic 50'

Example:

$ gsettings set org.gnome.Terminal.Legacy.Profile:/org/gnome/terminal/legacy/profiles:/:b1dcc9dd-5262-4d8d-a863-c897e6d979b9/ font 'Ubuntu Mono Italic 50'
$

Caution: do not put font size in high values, it will make the OS non operative. by mistake i press 512 instead of 52 and press enter..struggled a lot to get back.