When editing or composing an email and I have need to select an entire line via mouse or keyboard shortcuts, it includes the line ending. So when I am deleting or overwriting my selection that reaches the end of the current line, it also deletes the next line as well.

I've never had an html editor exhibit this behavior before and even after using zoho for years now, it still trips me up.

What is the purpose of this, or is this just a setting I need to change somewhere?