set scrolloff and colorcolumn

init.lua

@@ -29,6 +29,13 @@ vim.opt.autoindent = true
 vim.opt.smartindent = true
 -- a stricter alternative which works better for the C language:
 vim.opt.cindent = true
+
+-- keep cursor <lines> away from the top and bottom of the screen
+vim.opt.scrolloff = 6
+
+-- marker at line 80
+vim.opt.colorcolumn = "80"
+
 -- use language‐specific plugins for indenting (better):
 vim.cmd("filetype plugin indent on")