How to operate the mouse with a keyboard??
You can move the mouse cursor by hitting the arrow keys on your numeric keypad, pixel by pixel, using a feature called Mouse Keys in Microsoft Windows. Those who are unable to use a mouse can benefit from the "Ease of Use" feature called Mouse Keys. For instance, if their mouse malfunctions or runs out of batteries, other users might find Mouse Keys beneficial.
How to turn on/off the mouse keys??
The keyboard shortcut:
There is a keyboard shortcut you can use to activate and off Mouse Keys in all versions of Windows.
Mouse Keys is a setting in Windows 10's Ease of Access that may be switched on and off. You can navigate menus with the Spacebar and Tab keys if your mouse isn't working.
When you activate Num Lock, you'll hear a high-pitched beep. This noise signals that your mouse pointer is being managed by your numeric keyboard. The mouse cursor advances one pixel in the directions you press on your numeric keypad when you press 8, 6, 4, and 2 (up, left, right, and down). Num Lock is typically toggled on laptops by simultaneously hitting the Num Lock and Fn keys. The keys on some laptop numeric keypads can also be used for keyboard letters and other numbers (e.g., 7, 8, 9, U, I, O, J, K, L). These keys output a number when the Num Lock is enabled. To learn more about your particular laptop, consult the manual.
If the shortcut key combination mentioned above does not work, the steps below could be used to enable or disable mouse keys. Use the spacebar and Tab key to browse menus if your mouse isn't working.
Windows XP, Vista, and 7:
The steps given below can be used to enable or disable Mouse Keys if the shortcut key combination mentioned above does not work. Use the Tab key and spacebar to browse menus if your mouse isn't working.
Use of Mouse Keys:
It is used to ascend and turn to the left.
It is used to move up.
It is used to ascend and turn to the right.
It is used to move left.
It is used to move right.
It is used to move left and downward.
It is used to move down.
It is used to move to the right and downward.
It is used to choose the left mouse button.
It is decide which mouse buttons to select.
It is used to right mouse button to select
It is used to Click.
It is used to Right-click.
It is used to Double-click.
It is used to drag an item.
It is used to put the thing you're dragging down.