This would need a modification of the API:Add option to remove attached file from post (while composing).
...
https://github.com/Wood-Man/XDA-Labs-Issues-and-Suggestions/issues/32
You can read OPs for more info about already known issues, API limitations or already suggested ideas.
I think you probably meant post "byline" and not "signature". I suggest you to search for "byline" keyword in this thread and you will see that customizing more the byline probably won't be a thing on xda labs....
Also, add option to include rom build in signature (heck, even app build); can be useful on many occasions.
Examples:
- https://xdaforums.com/android/apps-games/labs-t3241866/post65726166
- https://xdaforums.com/android/apps-games/labs-t3241866/post76161519
https://xdaforums.com/android/apps-games/labs-t3241866/post66277190
This link above is a workaround but this "save wallpaper" feature addition was planned for the app initially (again. read OPs as always) but seeing how priorities go, I'm not sure it will be possible any time soon.
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