Thank you for your support – I really appreciate it! 

I understand that subscriptions are not for everyone. Adding an option for optional donations is something I'll consider for the future.

Good point, I'll need to think about it.

I believe other editors solve this by displaying only the differing parts of the file path when there are multiple tabs with the same file name. On iPhone this probably won't help much because of the limited room for file names in tabs, but it would help on iPad.

A setting to always show the folder name alongside the file name (e.g., "path/index.php" as you described) should be relatively easy to implement.

In Textastic on macOS, hovering the cursor over a tab shows a tooltip with the full file path. Maybe something similar could be added to iPadOS – though it would only be helpful when using a mouse or trackpad.

Have a look at a theme that has colors for Markdown - for example "Mac Classic": 

https://tmtheme-editor.glitch.me/#!/editor/theme/Mac%20Classic

To give Markdown headers (or a header in any markup language) a different color, it uses the "markup.heading" scope selector.

For lists, you can use "markup.list".

In Textastic, you can press Control-Shift-P to show the scope at the cursor location.

Well, that would be another option. But it currently behaves as documented in the manual:

https://www.textasticapp.com/v10/manual/managing_files/find_in_files.html#settings

Text

Search for a simple text string. You can also search for “\n” or “\r” to find newline characters and “\t” to find tab characters. Enter “\\” to search for a backslash.

Regular Expression

Enable regular expression search. Textastic uses the ICU regular expression syntax.

You need to escape each backslash. To find one backslash, enter \\. To find three backslashes enter \\\\\\ (6 backslashes). 

That is because you can search for \t to find tabs and \n to find newlines. 

The problem may be that the title bar only allows you to change the file name, not the file extension/type. That’s a limitation of the macOS document system.

Use File -> Save instead. 

Thanks for the video.

In the save sheet, when saving an untitled file, you should be able to change the file extension from "txt" to "md". I just tried this out and it works for me.

I'd recommend the following: after creating a new file in Textastic, immediately change the syntax definition from Plain Text to e.g. Markdown (in the bottom bar). Then, when you enter text and save the file, Textastic should automatically suggest .md as the file extension.