1. The first issue is that I don't find a simple line-spacing command in TextMaker. In Word, you can choose Select All and click icons for single, 1.5x, or double spacing or choose these options from Format > Paragraph. But in TM I only see the option Format > Paragraph > Line spacing, and then enter line spacing by points. That is very inefficient. Am I missing something? Is the feature hiding somewhere?
You can choose between different modes. Choose Auto an set it to 200 to get double line spacing (depending on the font size and font face, what is -- I think -- exactly what you need). If you chosse one of the other modes, you have to do the calculation by yourself.
The problem is that if I hit Enter twice to insert extra space between paragraphs, and then move the cursor to the end of the first paragraph and hit Delete twice to see what single-spacing looks like, TM insists on justifying the last line of the paragraph, even if it contains just 4-5 words, which makes the last line look bad, with very wide spacing between words.
This is due to Word-compatibility. To switch the behavior Open File->Properties->View and hit the Compatiblity-Button and deactivate it.
3. In fact, I'm unable to delete the extra line I inserted between paragraphs. Pressing Delete or Backspace doesn't work.
What extra line? Is "Track changes" active? If not, please attach a sample-document to reproduce this problem.
Generally, it goes like this: I'm editing with TC turned on but changes not showing.
Tools->Changes->Show changes is active?