Towards a more complete Text Navigation facility

Your idea

I was prompted to submit this feature request because I noticed that, when creating text, OPT-DEL (in MacOS) does not delete the previous word. Instead, the keystroke CMD-DEL is supplied. However, this is non-standard amongst today's apps. I refer you to the following example apps:
Notion, Text Edit, MS Word (also CMD-DEL), Google, iCal, Apple Notes (also CMD-DEL), DayOne, Kindle, Spotify, Finder, 1Password, Preview, Netflix.

I propose that this be changed to

• OPT-DEL: Delete the previous word

• CMD-DEL : Delete to the start of the line

and I further propose a more general scheme, as follows.

• OPT-DEL : Delete the previous word
• 
CMD-DEL : Delete to the start of the line

• OPT-left-arrow : Move the cursor to the start of the previous word
• 
OPT-right-arrow : Move the cursor to the start of the next word
• 
CMD-left-arrow : Move the cursor to the start of the line

• CMD-right-arrow : Move the cursor to the end of the line
  Note: For a specification for Windows, modify the above appropriately.


Problem to be solved

I believe that this modification will give the product a more robust and professional feel.

Prior art

No response

Additional context

Note: I tested the above on 'Expression text', 'Stave text, and 'Title text'.

Note: In the MU3 manual, CMD-DEL is not mentioned under Text / Keyboard shortcuts / Text edit mode.
 —Whatever decision is made, the MU4 manual should include the above.

Note: I see that UNDO does not work properly with text operations in general.

- The focus changes from 'edit text' to 'object selected'.


- Multiple history actions are clumped together.

Start by reproducing the shortcut behavior in Expression text, Stave text, and Title text, then locate the text-edit keyboard handling and the MU4 manual section for Text / Keyboard shortcuts / Text edit mode. Confirm the desired MacOS behavior, determine the appropriate Windows mapping, and separately assess the reported undo problems before defining what is included in the change.