https://support.apple.com/en-us/HT201236

Delete whole line(s) of text

Ctrl + A + K + K

To delete consecutive lines press K multiple times.

Keyboard - Shortcuts - App Shortcuts - Add “Paste and Match Style” with Shortcut Cmd-V.

Command + Shift + .

Text control

C-A Go to the beginning of the line.

C-E Go to the end of the line.

C-F Go one character forward.

C-B Go one character backward.

C-P Go to the previous line.

C-D Delete the character at the cursor.

C-N Go to the next line.

C-K Erase all the characters to the end of the line.

C-T Flip the character your cursor is on and the one before it.

Command + Control + Power Button: Press this keyboard shortcut to force restart your Mac.

Command Control + Media Eject button: Press this combination to quit all apps and restart the Mac.

Command + Option + Control + Power Button: Press these buttons to quickly turn off your Mac. Log out of current user account with Keyboard Shortcut

Command + Shift + Q: Press this key combination to log out of the current user account. Log out will happen after confirmation.

Command + Shift + Option + Q: When you add Option key to the mix, you will not be asked to confirm and log out will occur right away. Put Mac to Sleep with Keyboard shortcut

Shift + Control + Power (or Eject) button: Press this key combination to quickly turn off the screen, and put Mac to sleep.

Command + Control + Q: Lock screen

Ctrl-F2: menu bar

Ctrl-F3: dock