How to display a cell at the cursor position during cell selection in 'Command Mode'?

This is a general UI problem when a cell contains too many lines of code to display on one screen, .

For example, assume I'm on line 100 in cell A in 'Edit Mode'. I press `ESC` to enable 'Command Mode', and 'J' to select the next cell, and then 'K' to select back to cell A (still in 'Command Mode'). The cell A is displayed from the 1st line, but I hope it's from line 100 where I last edited it.

If I press 'ENTER' to enable 'Edit Mode', the cursor is located to line 100 correctly, however, in 'Command Mode' how to display the cell at where I edited it? Is there any workaround (extension widget) for this?

Reproduce the described transition between Edit Mode and Command Mode while selecting cells, especially returning to a long cell after moving away and back. Start by tracing the cell-selection and rendering entry points involved in Command Mode; done means the selected cell displays near the last edited cursor position without preventing normal mode switching.

Written by the indexing model from the issue text.