Hey there,
Trying something new here. Made this topic for I Love Textboxes, You Love Textboxes: We Made Changes to 'Em. This will allow @nsgriff to read all your positive feedback while keeping the initial thread clean and easy to read through. Initially tried moving all posts to a private message, but additional posts that came in later couldn’t be moved to the same message, so here’s a thread instead. This thread will be locked and unlisted.
Thanks!
Glad to finally see the official release of this! This makes editing text in text boxes not a pain.
Need to delete a section? Select and delete.
Want to copy a section? Easy as ctrl c.
Wan to select everything? Just do ctrl a.
Thanks to the teams that made this possible.
Game changer, nice updates should be plenty of uses for it.
This is amazing. Life changing. I no longer feel like a deflated avocado without highlightable text.
I applaude you. Thanks client development team for doing this.
This will save Alot of time, thanks for having this, a small yet useful update 
Awesome. Been waiting for something like this for years. Great update!
Ah yes, thanks for making life easier again
Amazing work, this will save so much time.
Excellent, now I don’t have to find the right GuiObject to edit them. Now we’re skipping the searching step.
Great update, I’ll love working with this!
Noticed this on the player’s chat some time ago (highlighting specifically). VERY useful feature!
Are we gonna have an early Christmas this year? 
All around great update!
I noticed this a little while ago whilst using the Developer Console. Very useful and much needed, great update!
I feel like this update announcement was taken from something Discord normally does (which is a cool thing!)
Its about time. The lack of this feature has always been a bit annoying to me. Thanks for the addition!
Yes! Amazing! This is super useful.
This just makes Textboxes all the better!! Fantastic update!!