We'll see shortcuts that could probably help you with text in ABAP: CTRL+K, CTRL+L, CTRL+U, CTRL+J and CTRL+T
See the sample text below
write: / 'Lorem Ipsum Dolor Sit Amet,'.
write: / 'consectetur adipiscing elit.'.CTRL+K alternates all the selected text between uppercase and lowercase
write: / 'lOREM iPSUM dOLOR sIT aMET,'.
write: / 'CONSECTETUR ADIPISCING ELIT.'.CTRL+L sets the selected text to lowercase.
write: / 'lorem ipsum dolor sit amet,'.
write: / 'consectetur adipiscing elit.'.CTRL+U changes the text to uppercase
write: / 'LOREM IPSUM DOLOR SIT AMET,'.
write: / 'CONSECTETUR ADIPISCING ELIT.'.CTRL+J sets all the first letters to uppercase.
write: / 'Lorem Ipsum Dolor Sit Amet,'.
write: / 'Consectetur Adipiscing Elit.'.CTRL+T sets only the first selected letter to uppercase.
write: / 'Lorem ipsum dolor sit amet,'.
write: / 'Consectetur adipiscing elit.'.