Change First Startup Window Size

.var/app/org.gimp.GIMP/config/GIMP/2.10/sessionrc

@@ -1,5 +1,5 @@
 # GIMP sessionrc
-# 
+#
 # This file takes session-specific info (that is info, you want to keep
 # between two GIMP sessions).  You are not supposed to edit it manually, but
 # of course you can do.  The sessionrc will be entirely rewritten every time
@@ -11,13 +11,13 @@
     (size 620 200))
 (session-info "toplevel"
     (factory-entry "gimp-single-image-window")
-    (position 255 82)
-    (size 1920 856)
+    (position 250 80)
+    (size 1280 720)
     (open-on-exit)
     (aux-info
         (left-docks-width "52")
         (right-docks-width "363")
-        (maximized "no"))
+        (maximized "yes"))
     (gimp-toolbox
         (side left))
     (gimp-dock

.var/app/org.gimp.GIMP/config/GIMP/2.10/themerc

@@ -2,7 +2,7 @@
 #
 # This file is written on GIMP startup and on every theme change.
 # It is NOT supposed to be edited manually. Edit your personal
-# gtkrc file instead (/home/dio/.var/app/org.gimp.GIMP/config/GIMP/2.10/gtkrc).
+# gtkrc file instead (~/.var/app/org.gimp.GIMP/config/GIMP/2.10/gtkrc).
 
 style "gimp-spin-scale-style"
 {
@@ -13,6 +13,6 @@ class "GimpSpinScale" style "gimp-spin-scale-style"
 
 include "/app/share/gimp/2.0/themes/Dark/gtkrc"
 include "/app/etc/gimp/2.0/gtkrc"
-include "/home/dio/.var/app/org.gimp.GIMP/config/GIMP/2.10/gtkrc"
+include "~/.var/app/org.gimp.GIMP/config/GIMP/2.10/gtkrc"
 
 # end of themerc