Explanation

Select all of the text in your document or on your screen by holding down the "Ctrl" key and pressing the letter "A". 

mportant keys

Ctrl+N - Create a new document

Ctrl+O - Open an existing document

Ctrl+S - Save a document

F12 - Open the Save As dialog box

Ctrl+W - Close a document

Ctrl+Z - Undo an action

Ctrl+Y - Redo an action

Alt+Ctrl+S - Split a window or remove the split view

Ctrl+F - Search a document

 Ctrl + A used for  Select All Text

"Ctrl + End" is used to move the cursor to the end of the Document.