Edit ~/.vimrc
source vimrc:
1 :so ~/.vimrc
1. ctrl - left / right switching tabs
https://vim.fandom.com/wiki/Using_tab_pages
With the following mappings (which require gvim), you can press Ctrl-Left or Ctrl-Right to go to the previous or next tabs, and can press Alt-Left or Alt-Right to move the current tab to the left or right.
nnoremap <C-Left> :tabprevious<CR> nnoremap <C-Right> :tabnext<CR> nnoremap <silent> <A-Left> :execute 'silent! tabmove ' . (tabpagenr()-2)<CR> nnoremap <silent> <A-Right> :execute 'silent! tabmove ' . (tabpagenr()+1)<CR>