Feature Request: allow _ and = char toggle +/- 0.5 seconds interval change

[terryding77]

for laptop compute, there is no seperated - and + key on keyboard, so that minus "-" and plus "+" are the key near the backspace.
+ equals shift =
_ equals shift -
so can we ignore the shift command to allow _ and = char to change the interval?

[blacknon]

Looks good!

[blacknon]

In order to handle this issue in a more general manner, we have created a new issue #106 and have responded to it.
You can set a custom keymap with the -K option.

can set = with equal.

[blacknon]

I think it's okay now, so I'll close it.