Scroll through VSCode terminals one line at a time

I would like to scroll only one line on the VSCode terminal (Bash).
Generally, it can be done with Shift+↓or↑, but in my environment, B and A are entered on the terminal respectively.
As shown in the screenshot attached below, the keyboard shortcuts are not set to enter B or A, but if anyone knows how to solve this problem and scroll through just one line, could you please let me know?

Also, Shift+←or→ will input D and C.I would also appreciate it if you could set this up so that you can select the range one character at a time on the terminal.

The running environment is Windows 10 Pro.I look forward to hearing from you.