~/.config/nvim/init.lua
vim.g.mapleader = " "
vim.opt.number = true
vim.opt.autoindent = true
vim.opt.tabstop = 2
vim.opt.shiftwidth = 2
vim.opt.smarttab = true
vim.opt.softtabstop = 2
vim.opt.expandtab = true
vim.opt.mouse = 'a'
vim.opt.termguicolors = true
vim.keymap.set('v', '<', '<gv', { remap = false })
vim.keymap.set('v', '>', '>gv', { remap = false })
In particular, to use > to indent and < to unindent while in visual select mode, without having to reselect the text, so that in visual select mode, you can tap > or < to shift right or left repeatedly, respectively:
vim.keymap.set('v', '<', '<gv', { remap = false })
vim.keymap.set('v', '>', '>gv', { remap = false })
For posterity, this used to be done in older Vim with this:
vnoremap < <gv
vnoremap > >gv