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urxvt-font-size(1) RXVT-UNICODE urxvt-font-size(1)


font-size - interactive font size setter


Put the font-size script into $HOME/.urxvt/ext/ and add it to the list of enabled perl-extensions in ~/.Xresources:

  URxvt.perl-ext-common: ...,font-size

The extension automatically binds Ctrl++ to the 'increase' function, Ctrl+- to 'decrease', and Ctrl+0 to 'reset'. To use the other available functions or change the keys, add some keybindings of your own:

  URxvt.keysym.C-Up:     font-size:increase
  URxvt.keysym.C-Down:   font-size:decrease
  URxvt.keysym.C-S-Up:   font-size:incglobal
  URxvt.keysym.C-S-Down: font-size:decglobal
  URxvt.keysym.C-equal:  font-size:reset
  URxvt.keysym.C-slash:  font-size:show

Note that for urxvt versions older than 9.21 the resources have to look like this:

  URxvt.keysym.C-Up:     perl:font-size:increase
  URxvt.keysym.C-Down:   perl:font-size:decrease
  URxvt.keysym.C-S-Up:   perl:font-size:incglobal
  URxvt.keysym.C-S-Down: perl:font-size:decglobal
  URxvt.keysym.C-equal:  perl:font-size:reset
  URxvt.keysym.C-slash:  perl:font-size:show

Supported functions:

  • increase/decrease:

          increase or decrease the font size of the current terminal.
  • incglobal/decglobal:

          same as above and also adjust the X server values so all newly
          started terminals will use the same fontsize.
  • incsave/decsave:

          same as incglobal/decglobal and also modify the ~/.Xresources
          file so the changed font sizes will persist over a restart of
          the X server or a reboot.
  • reset:

          reset the font size to the value of the resource when starting
          the terminal.
  • show

          show the current value of the 'font' resource in a popup.

You can also change the step size that the script will use to increase the font size:

  URxvt.font-size.step: 4

The default step size is 1. This means that with this setting a size change sequence would be for example 8->12->16->20 instead of 8->9->10->11->12 etc. Please note that many X11 fonts are only available in specific sizes, though, and odd sizes are often not available, resulting in an effective step size of 2 instead of 1 in that case.

2021-05-21 9.22