Cant see the options for deleting anchor points only?

Can anyone help?

I can't simply delete anchor points within a line without breaking the shape... I have seen a post showing that there should be an option to do this within the pen tool as image attached, but this is not showing up for me. Anyone know how I get this option up? I can't see anything in 'view'.

I used to use the selection tool to marquee over unwanted points then delete them without pathways being deleted. What am I doing wrong here?