I want to put the period before my superscript footnote numbers. How? GREP?

Well, I still believe, it’s possible using GREP... with some assuming, and in three steps. Unfortunately, GREP has some limitation/feature/bug we need to 'hack’. Also it’s a good idea to create special Character style for your numbs (if you haven’t the one already).

So, here’s our initial text:

We’ll need two additional glyphs that are NOT used anywhere in the text. I’ll use:

broken bar: ¦

dagger: †

Find what:

[,\d]+

Change to:

¦$0†

Find format: color: Orange

Change format:

color: [Black] + position: normal

Here goes the main trick:

Find what:

(¦[,\d]+†)([[:punct:]])

Change to:

$2$1

Don’t forget to trash Find and Change formats before running this!

And finalizing:

Find what:

(¦)([,\d]+)(†)

Change to:

$2

Change format:

Character Style: my orange numbs