The autoincrement checkbox in Field configuration allows you to specify that a field's Default value for new entries should increase numerically for each new entry. Each new entry will therefore have a unique field value.

Autoincrement checkbox

For example, if you specify a default value of “1” for a field, and enable the autoincrement feature, the first new entry will have a value of “1”, but the second new entry will have a value of “2”.

For Text values, you can include numbers, letters or punctuation that you want to be part of the value but which won’t increment. For example, with a default value of “AA-0009”, the second new entry will have a value of “AA-0010”.