What is button in WordPad

This is the main part of Word Pad, this button is in the menu, in which many options are given for the files created in WordPad, in this you are given commands like Save, Open, Print, etc. From these we work on the WordPad Document, in this we have Shortcut Keys. e.g. Ctrl+O for Open, Ctrl+N for New, Ctrl+S for Save, Ctrl+P for Print, etc.