On top of screen go to
Edit
then
Select All
Not entirely, but you can use a mouse to select ranges you include in a formula.
Assuming you're using Microsoft Excel, select the entire column by clicking and dragging with the mouse, then press the AutoSum button (looks like Σ).
i have no clue
Can you be more specific about what are you trying to do and on what device? There are two methods to move around in your document, If you are using a mouse, you can move around each page of a document by scrolling up and down using the "Scrolling wheel" on mouse. If you are using a keyboard, you can move around using the "Page Up and Page Down" arrow keys on your keyboard.
When you are writing something you are using the keyboard and occasionally the mouse.. for example something in a word document.
You can type it in or select the range using the mouse or keyboard.
Printer
It is called the "mini toolbar."
by clicking grey are on the left
Ctrl + L, or using the mouse by dragging the cursor on the word from the right side of to the left side.
Cells can be selected by the mouse or the keyboard. Pressing and hold the left mouse button and dragging across cells will select them. Pressing and holding the shift hey and then using the cursor keys can select cells. The F8 key can also be used to select cells.
Press the Ctrl+A buttons using keyboard. or Click on the Selet all icon which will be in top left side of the sheet it will select the entire worksheet