Yes, you can use SPC f f, enter the name of the new file and then select the line starting with [?] (which is the default if no other file matches). Note you can also use this to create files in non-existing subfolders, like SPC f f my/sub/folder/file.txt RET.
I found this article: http://blog.binchen.org/posts/easy-indentation-setup-in-emacs-for-web-development.html I added this part of the code into my .spacemacs file outside of any function (but before (defun dotspacemacs/user-init () … )): (defun my-setup-indent (n) ;; java/c/c++ (setq c-basic-offset n) ;; web development (setq coffee-tab-width n) ; coffeescript (setq javascript-indent-level n) ; javascript-mode (setq js-indent-level n) ; js-mode (setq js2-basic-offset … Read more
Another way is to use the key sequence “SPC z x” and then press “+/=” key to increase font size or “-” key to decrease font size. Other options are shown on the which-key menu.