Change systemd boot menu resolution - how

ok found this on the live iso in the isolinux.cfg

ui vesamenu.c32
timeout 50
default live

MENU RESOLUTION 1024 768
menu title Solus 4.5 (GNOME)
menu background splash.png
MENU COLOR screen       37;40      #80ffffff #00000000 std
MENU COLOR border       30;44   #40ffffff #a0000000 std
MENU COLOR title        1;36;44 #ffffffff #a0000000 std
MENU COLOR sel          7;37;40 #e0ffffff #20ffffff all
MENU COLOR unsel        37;44   #50ffffff #a0000000 std
MENU COLOR help         37;40   #c0ffffff #a0000000 std
MENU COLOR timeout_msg  37;40   #80ffffff #00000000 std
MENU COLOR timeout      1;37;40 #c0ffffff #00000000 std
MENU COLOR msg07        37;40   #90ffffff #a0000000 std
MENU COLOR tabmsg       31;40   #ffDEDEDE #00000000 std
MENU HIDDEN
MENU HIDDENROW 7
MENU WIDTH 78
MENU MARGIN 15
MENU ROWS 4
MENU VSHIFT 17
MENU HSHIFT 25
MENU TABMSGROW 11

label live
  menu label Start Solus
  kernel /boot/kernel
  append initrd=/boot/initrd.img root=live:CDLABEL=SolusLiveGNOME ro rd.luks=0 rd.md=0 rd.live.overlay.overlayfs=1 quiet splash --
menu default
label live-nomodeset
  menu label Start Solus (nomodeset -- NVIDIA compatibility mode)
  kernel /boot/kernel
  append initrd=/boot/initrd.img root=live:CDLABEL=SolusLiveGNOME ro rd.luks=0 rd.md=0 rd.live.overlay.overlayfs=1 quiet splash nomodeset --
label live-debug
  menu label Start Solus (verbose debugging mode)
  kernel /boot/kernel
  append initrd=/boot/initrd.img root=live:CDLABEL=SolusLiveGNOME ro rd.luks=0 rd.md=0 rd.live.overlay.overlayfs=1 rd.debug rd.live.debug systemd.log_level=debug --
label local
  menu label Boot from local drive
  localboot 0x80

So it is possible but where do i amend the same resolution into my systemd boot menu