viper-ex-style-editing

viper-ex-style-editing is a variable defined in `viper-init.el'.
Its value is

t

• Automatically becomes buffer-local when set.

Documentation:
If t, Ex-style behavior while editing in Vi command and insert states.
`Backspace' and `Delete' don't cross line boundaries in insert.
`X' and `x' can't delete characters across line boundary in Vi, etc.
Note: this doesn't preclude `Backspace' and `Delete' from deleting characters
by moving past the insertion point. This is a feature, not a bug.

If nil, the above commands can work across lines.

You can customize this variable.