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The current version of TextPad protects against this endless loop in Replace All by advancing the cursor after matching an empty string. Older versions didn't.

There are two morals here:
1. avoid regexes that match empty strings;
2. use the current version of TextPad.

But now it's not text, but a picture of text.

You don't. Arial is a variable-pitch font. TextPad is a text editor, not a word processor, and it positions text horizontally by counting tabs and spaces. It does not add the widths of individual characters.

To do what you're doing you'll need to find a narrow fixed-pitch font.

I was wrong.
a. I had it the wrong way round (it should have been Set not Clear.)
b. I can't reproduce the reported effect anyway.
Sorry.

In Configure | Preferences do you not see a tree like this: ?

All of them. Use the one(s) for whichever class(es) you want to apply that setting.

Make sure either nothing is selected or your current selection includes a newline.

Clear C onfigure | P references | Document Classes | <Class> | Tabulation | Convert n ew tabs to spaces or, for the current document, V iew | Document P roperties | Tabulation | Convert n ew tabs to spaces Edit: I was wrong. a. I had it the wrong way round (it should have been Set not Clear .) b. I ...

Not that I am aware of.

It's worth saving these 2 files whenever you change any configuration settings: If you lose your settings, close all instances of TextPad, restore those files, and try again.

Entry from the numeric keypad doesn't seem to be working here either. Perhaps it's a Windows 11 thing. I don't know why EditUnicodeChar doesn't work for you. It should present you with a small text entry box at the cursor position into which you can enter the Unicode value in hexadecimal of the char...

The character in terrypin's original message is Unicode ⦿ (U+29BF, Circled Bullet), not • (U+2022, Bullet). If a document contains a character that does not exist in Windows-1252, the document should not be saved in Windows-1252 encoding. Otherwise, if the character has an equivalent in Windows-...

Same here.

Have you changed the font in the current document?
View | Document Properties (<Alt+Enter>), Font tab

Either highlight the character and run the EditUnicodeChar command (default shortcut: Alt+X ), or hover the mouse over it. You will see that it's Unicode character U+29BF (Circled Bullet). As AmigoJack says, it's the font that determines how it's displayed. It's displayed correctly with Lucida Sans ...

I suspect that you downloaded version 8.9 a year ago, not version 8.90.