As you're not exporting to any other format, it's probably more OK to ignore the LaTeX side of things. In the case that PDF is a desired output, the LaTeX side should not be ignored, and see the old answer below.
Go to Document --> Settings --> Local Layout, and add the following:
AlignPossible Block, Left, Right, Center
This modifies the Standard style to allow multiple spaces (
FreeSpacing 1) and empty paragraphs (
KeepEmpty 1). This will allow you to add spaces and newlines as you will, while not disabling math mode.
I guess the Save as document defaults button will make this default for new documents as well.
Well you can, but in general you probably shouldn't. There will probably be better ways of achieving what you're actually trying to do. That said:
- Adding multiple spaces can be done with Ctrl + Space (the LaTeX equivalent is inserting a
- Adding multiple line breaks can be done with Ctrl + enter, with the caveat that it doesn't work in an empty paragraph (the LaTeX equivalent is adding a