If you want to:

• add Unix-key word operations
• add option-b and option-f to move by word
• add option-del and option-backspace to delete by word
• add your own custom keys to iTerms

then please read on.

1. Open iTerm2's Preferences
2. Switch to Profiles tab
3. Select your profile on the left and switch to tab Keys on the right
4. Add your custom keys by click on + button
5. Focus on input Keyboard Shortcut in the new dialog and press the target key
6. Select action Send Hex Code or Send Escape Sequence
7. Add the hex code

For the most common Hex Code:

• Move backward: Send Escape Sequence + b
• Move forward: Send Escape Sequence + f
• Backspace word: 0x1b 0x08
• Delete word(forward): Send Escape Sequence + d

Here is the Full ASCII Table