In the early 1980s the Wordplex wordprocessor had a feature called Block Tab which made it easy to personalise documents ad hoc without doing a mail merge. When setting up the document you located the cursor where you wanted to put a variable chunk of text, and you pressed the Insert Block Tab key which put a marker into the document. You could have as many block tabs as you wanted in a doc. When personalising the doc you pressed the Find Block Tab key. This took you to the first block tab. You typed whatever text you wanted, then you pressed Find Block Tab again to get to the next one.

Does anyone know if this exists in Word?