Image manipulation is a very common feature for editors within TYPO3 CMS.
With this little Extension you can predefine ratios and their labels for the backend.
Simply install the extension via Extension Manager or via composer.
Add this repository to your ```composer.json``
"repositories": [
{
"url": "https://github.com/joekolade/setimagemanipulationratios.git",
"type": "git"
}
],
Then require the extension:
composer require js/setimagemanipulationratios --no-update
and update composer dependencies (--no-dev flag is optional)
composer update --no-dev
Have fun!