How to redisplay when terminal size is changed?

[failable]

When terminal size is changed it won't redisplay automatically. How can I trigger redisplay?

[AlFaizCodes]

When the terminal is resized, the operating system sends a SIGWINCH signal to the application. To redisplay content, handle this signal, read the new terminal size, clear the screen, and redraw the UI according to the updated dimensions. Most terminal libraries (like ncurses) provide built-in support for handling resize events.

[ShreeChaturvedi]

Quit with q and run git diff again. Delta reads the terminal width once, wraps the side-by-side columns, then writes that already-wrapped text to less. The pager can redraw the screen, but it cannot reflow columns that delta already painted.

If the display is only garbled after a resize, press r or Ctrl-L in less to repaint. Capital R reloads a file. It does not restart delta, so the wrap stays the same.

There is no live-reflow option and no SIGWINCH handler in delta. delta.width (or --width) only applies on the next run.