rebind zoom to ctrl shift +/- font and font size

st-zoom-cspu-robofont-size.diff

diff -u a/config.def.h b/config.def.h
--- a/config.def.h	2020-06-19 12:29:45.000000000 +0300
+++ b/config.def.h	2021-03-22 12:19:09.951353976 +0200
@@ -5,7 +5,7 @@
  *
  * font: see http://freedesktop.org/software/fontconfig/fontconfig-user.html
  */
-static char *font = "Liberation Mono:pixelsize=12:antialias=true:autohint=true";
+static char *font = "RobotoMono Nerd Font Mono:pixelsize=30:antialias=true:autohint=true";
 static int borderpx = 2;
 
 /*
@@ -191,8 +191,8 @@
 	{ ControlMask,          XK_Print,       toggleprinter,  {.i =  0} },
 	{ ShiftMask,            XK_Print,       printscreen,    {.i =  0} },
 	{ XK_ANY_MOD,           XK_Print,       printsel,       {.i =  0} },
-	{ TERMMOD,              XK_Prior,       zoom,           {.f = +1} },
-	{ TERMMOD,              XK_Next,        zoom,           {.f = -1} },
+	{ TERMMOD,              XK_plus,        zoom,           {.f = +1} },
+	{ TERMMOD,              XK_underscore,  zoom,           {.f = -1} },
 	{ TERMMOD,              XK_Home,        zoomreset,      {.f =  0} },
 	{ TERMMOD,              XK_C,           clipcopy,       {.i =  0} },
 	{ TERMMOD,              XK_V,           clippaste,      {.i =  0} },