I don't understand the header shortcuts ⌘H1,2,3 etc
As Adryan already remarked, you are referring to a keyboard shortcut for a heading, not a header.
⌘H1,2,3 etc. is an example of assigning keyboard shortcuts to menu commands (or macros) with
sequential multi-key shortcuts. Sounds bombastic, I know, but be assured, this is certainly one of the best features in Nisus and the one I'm sure you will love. It simply means, you can press and hold down any modifier key(s) you like (shift, ctrl, option, command) and then type additionally, while you still hold down the modifier key(s), any character you see on your keyboard, one after the other. There seems to be no limitation for how many characters you can type. This makes it easy to remember (long) keystrokes.
Example: Suppose you have a clean-up macro that fixes typos, wrong punctuation and bad formatting. How would you create a keyboard shortcut for this purpose and be sure you'll permanently remember it? Well, why not just use the shortcut Cmd+cleanup (without the plus sign)?
Another example: I often need to make the structure of a chain of arguments clear by inserting (1), (2), (3), (4), (5), (6) before each argument. Having to type brackets and numbers each time I wanted to make something clear, would drive me crazy. Therefore I create macros for this. Each macro consists of only one line. The macro for inserting (
1) reads: Type Attributed Text "(
1) ". The macro for inserting (
2) reads: Type Attributed Text "(
2) ", and so forth.
Now, to invoke each macro I use these keyboards shortcuts:
ComN1,
ComN2,
ComN3,
ComN4,
ComN5,
ComN6, etc. This means, if I press and hold down the command key and then type "n" (without the quotes, n stands for 'number', of course) followed by 2, Nisus will insert (
2) into my document.
As a side-note (and if you have not begun to use macros yet): if you don't want a red number, then you can change the number color to black or use the command Type Text "(
2)".
You could, theoretically, also create a
keyboard shortcut like
Com+number1 (without the plus sign), but that would defeat the purpose because it's too long. It takes more time to write the shortcut than writing the brackets and the number. :–)