Step 1: Click Magic Edit above.

Step 2: Click the highlighted text block you want to change.

Step 3: Edit your text. Once done, click anywhere on the blank document.

Step 4: Drag your newly typed text out of the way for a second.

Step 5: Click the white rectangle (whiteout) that appeared behind your text and adjust its size so it perfectly covers the original underlying text.

Step 6: Drag your new text back over the white box, click Export PDF, and you are done!