SnipperApp provides you a set of shortcuts to save your time.
Catalog
shift + cmd + N- create new folder↓ & ↑- navigate between folders← & →- open and close folders tree
Snippets list
cmd + N- create new snippet↓ & ↑- navigate between foldersshift + cmd + I- import snippets
Editor
shift + cmd + L- show & hide line numberscmd+ & cmd-- increase & decrease font sizecmd + L- open "Go to line" window
Other
ctrl + cmd + F- enter full screencmd + M- minimize SnipperApp windowcmd + ,- open preferences window