Michael G wrote:
“The one advantage, important to me, that Textpad seems to have is the ability to work with a column of text. For example, I can highlight a column of text then fill it with characters or a sequence of numbers.”

I use Textpad a lot and I thought it had all the features I required except the one you refer to. (I used to use this with IBM’s PE2, many moons ago)

What keystrokes are required to achieve the column fill?
What version of Textpad are you using?

Regards, Martyn.